Speed to Lead
Date: 2026-09-27
How quickly an enquiry gets a human response. The direction is well supported — slow follow-up loses leads — but the famous multipliers come from vendor-backed observational studies, and they can’t separate “responding fast” from “being the kind of company that responds fast”.
Speed to lead is the time between a lead submitting an enquiry and the business first making contact.
The numbers that circulate, and where they’re from
Two studies, routinely merged and misattributed:
| Claim | Source | What it actually was |
|---|---|---|
| Contacting within 5 minutes vs 30: ~100× more likely to reach, ~21× more likely to qualify | Lead Response Management Study, James Oldroyd (then at MIT Sloan) with InsideSales.com, 2007 | Call-log data from six companies — a vendor-partnered analysis, not peer reviewed |
| Average response time 42 hours; 23% never responded; contact within an hour ~7× more likely to qualify than an hour later, and 60×+ more than after 24 hours | Oldroyd, McElheran and Elkington, The Short Life of Online Sales Leads, Harvard Business Review, March 2011 | An audit of 2,241 US companies’ responses to test web leads |
The 5-minute / 21× figure is usually credited to Harvard; it’s from the 2007 MIT/InsideSales study. [CHECK: the exact comparison bands behind the HBR 7× and 60× figures against the article itself before quoting either — secondary sources state them inconsistently.]
Treat both as weakly sourced for the size of the effect. Neither was a controlled experiment.
Why the multipliers overstate it
The studies compare leads that happened to be called fast with leads called slowly. That’s a comparison between different situations, not the same lead at two speeds:
WHAT ELSE DIFFERS BETWEEN FAST AND SLOW RESPONSES
fast response slow response
──────────────────────────────── ────────────────────────────────
submitted during office hours submitted at 11pm on Saturday
sales team not at capacity backlog of 200 leads
high-intent form (demo request) low-intent form (whitepaper)
disciplined sales team team that doesn't follow up at all
Each of those predicts qualification on its own. The speed effect is mixed up with all of them — confounding — Correlation and Causation.
In plain terms: “leads called within five minutes qualified far more often” is true. “Calling any lead within five minutes makes it far more likely to qualify” doesn’t follow from it. The real effect is probably positive and smaller.
Why the direction is still right
Mechanisms that hold regardless of the exact multiplier:
- Intent decays. The enquiry was made in a moment of attention; an hour later the person is doing something else
- They enquired elsewhere too. Comparison shoppers fill in three forms; the first to respond sets the frame
- Reachability. Someone who just submitted a form is at a device, often on the page
Testing it properly
It’s one of the few sales levers that can be randomised cheaply:
- Randomise response speed within a lead source for a few weeks — route half to immediate callback, half to the normal queue — and compare SQL rate by arm — A-B Tests
- Randomise by lead, not by day, so time-of-day and backlog are balanced between arms — Randomisation Unit
- Measure downstream, at SQL or won, not at “contacted” — Lead Funnel Stages
Fixing it
- Route instantly. The delay is usually in assignment, not in the salesperson — leads sitting in a shared inbox until someone triages them
- Cover the hours leads arrive. Look at submission timestamps; many arrive out of hours — Timezones and Date Boundaries
- Offer self-serve booking on the thank-you page. A calendar slot chosen at submission turns response time into zero for the people who take it
- Measure it. Median and 90th-percentile time to first contact per source. The average hides the leads that waited three days — Skewed and Heavy-Tailed Distributions
Slow follow-up is the most common reason good leads look bad — check it before blaming the campaign — Lead Quality vs Volume.