Speed to Lead: What the MIT and HBR Studies Actually Found

Speed to lead works. Harvard Business Review's study of 2,241 companies found that firms contacting a lead within an hour were nearly seven times as likely to qualify it as firms that waited longer. The separate MIT / InsideSales study found that calling within five minutes, rather than thirty, made contact 100 times more likely.

Last updated: September 2026

Everyone in sales has heard some version of "call leads fast." Fewer people have read the research behind it. Two studies get quoted the most, and they get blended together a lot. They shouldn't be. They measured different things, in different ways. Here is what each one actually found, what it doesn't prove, and what to do on Monday.

What did the Harvard Business Review study find?

In 2011, James Oldroyd, Kristina McElheran and David Elkington published "The Short Life of Online Sales Leads" in Harvard Business Review. They looked at how 2,241 US companies responded to web-generated leads.

The findings were blunt:

• Firms that tried to contact a lead within an hour were nearly seven times as likely to qualify it as firms that waited longer.
• Compared with firms that waited 24 hours or more, the within-an-hour firms were more than 60 times as likely to qualify the lead.
• The average response time was 42 hours.
• 23% of the companies never responded at all.

Read those last two again. A lot of companies were paying to generate leads and then letting them sit for almost two days. Nearly a quarter never called back. The bar for being "fast" was, and often still is, very low.

What did the MIT / InsideSales study find?

The second study is the Lead Response Management study from MIT and InsideSales. It zoomed in on the first hour, minute by minute.

Its headline result: calling within five minutes, compared with calling within thirty minutes, made a team 100 times more likely to contact the lead and 21 times more likely to qualify it.

So the HBR study tells you the first hour matters. The MIT study tells you the first five minutes matter even more. Different studies, different measurements, same direction.

What don't these studies prove?

Honest reading matters here, because people stretch these numbers.

• They are about inbound leads. Someone filled out a form or asked for information. They say nothing about cold outreach.
• They are not recent. Buying habits have changed. The direction of the finding has held up in practice; the exact multipliers may not.
• They show correlation. Fast-responding companies might also be better run in other ways. Speed is likely part of the story, not all of it.
• They do not test sixty seconds. Neither study measured a one-minute response. That part is our rule, not their finding.

None of this weakens the practical point. A lead who just asked for help is paying attention right now. In an hour, they are in a meeting, on a competitor's site, or making dinner.

Why does calling fast work so well?

Nothing mysterious. A few plain reasons:

1. They are still at the screen. The form was submitted seconds ago. The phone is in their hand or on the desk.
2. They remember why they asked. The problem that pushed them to fill in the form is fresh. Twenty-four hours later it has competition.
3. You are first. Many buyers contact more than one company. The first real conversation sets the frame for everything after it.
4. It shows how you work. Answering fast is a small, concrete proof that you will be easy to deal with.

Why sixty seconds, if the studies say five minutes?

Because targets drift. If the goal is five minutes, reality turns into fifteen. If the goal is an hour, reality turns into tomorrow. Sixty seconds is short enough that it forces a system. You cannot hit it by trying harder. You hit it by setting things up so the call is the default.

Miss sixty seconds and you are still well inside five minutes. That is the point.

How do you set up a team to call within sixty seconds?

Speed to lead is an operations problem before it is a sales skill. The setup:

1. Route leads to a person, not an inbox. A shared inbox means everyone assumes someone else has it.
2. Alert on a phone, loudly. Push notification, text, or a ringing desk line. Email alerts are too slow.
3. Name a backup. If the owner does not claim the lead in a minute, it goes to the next person.
4. Keep the opener ready. Nobody should be writing a script while the lead cools.
5. Cover the hours you get leads. Look at when forms actually come in. Staff those windows.
6. Measure it daily. Median time from form to first dial. Put it on the wall where everyone sees it.

What do you say when you call that fast?

Keep it short and honest. They will be a little surprised. That is fine.

"Hi Sarah, it's Dan from Northfield. You just asked about pricing on our site, so I figured I'd call while it's fresh. Have you got two minutes, or is later today better?"

If they are busy, book it on the spot:

"No problem. What's better, 3:30 today or 9:00 tomorrow? I'll send a calendar invite now."

If they ask how you called so quickly:

"We call everyone right away. If you took the time to ask, you shouldn't have to wait for an answer."

Voicemail? Leave one line and send a text:

"Hi Sarah, Dan from Northfield, calling about the pricing request you just sent. I'll try you again in ten minutes, or text me at this number whenever suits."

Then call back in ten minutes. Most teams give up after one attempt. Do not be most teams.

Key numbers

Where does speed to lead go wrong?

• Fast but unprepared. You call in 40 seconds and have no idea what they asked for. Glance at the form first. It takes five seconds.
• Fast once, then slow. The first call is quick, the follow-up is a week later. Speed applies to every touch.
• Email instead of phone. An auto-reply is not a response. It is a receipt.
• Treating it as a personal virtue. Some reps will always be fast. The team result depends on the system, not the fast rep.

Put it where the team can see it

A rule only works if people remember it at 4:45 on a Friday. That is why Rule 02 lives on a wall. The Rule 02: Call in sixty seconds poster comes with a six-page guide covering why it works, how to run it, word-for-word scripts, where it goes wrong, and a five-day drill.

Related rules:

• Rule 01: Pick up the phone covers how many calls a day and the math to one meeting.
• Rule 03: Book the next call covers what to do once you have them on the line.