Speed to lead and follow-up: what the research shows

The audit of response times

The most cited source is a short Harvard Business Review article from March 2011 by James Oldroyd, Kristina McElheran and David Elkington. The authors audited 2,241 US companies by sending each a web-generated test lead and measuring how long it took to respond. Some 37% responded within an hour and 16% within one to 24 hours, while 24% took more than 24 hours and 23% never responded at all. Among companies that responded within 30 days, the average response time was 42 hours.^[1]

The article sets this against rising spending on lead generation: it reports that corporate spending on online advertising aimed at generating leads rose from $12.5 billion in 2005 to $22.7 billion in 2009. It suggests reasons for slow responses, including retrieving leads from CRM databases daily rather than continuously, sales forces focused on generating their own leads, and rules for distributing leads among agents and partners based on geography and fairness. The authors say they were still researching causes and solutions.^[1]

Speed and the chance of a conversation

The article refers to a separate study of 1.25 million sales leads received by 29 business-to-consumer and 13 business-to-business US companies. It reports that firms which tried to contact potential customers within an hour of receiving a query were nearly seven times as likely to qualify the lead as those that tried even an hour later, and more than 60 times as likely as companies that waited 24 hours or longer.^[1]

The authors define qualifying a lead as having a meaningful conversation with a key decision maker. That is an early step in a sales process, not a completed sale, and the article as read reports no results for conversion to revenue. The comparison is also a ratio between groups of firms, not a statement of what any single organisation would see if it changed its own response time.^[1]

Follow-up after the first contact

Academic work on what happens once leads reach a sales team points to a different bottleneck. Sabnis and colleagues, writing in the Journal of Marketing in 2013, describe a sales lead black hole: the 70% of leads generated by marketing departments that sales representatives do not pursue. Using data from 461 sales reps employed by four firms, they link follow-up to organisational lead prequalification and managerial tracking, to marketing lead volume, and to the experience and performance of the individual rep.^[2]

A 2025 Journal of Marketing study by Habel and colleagues examined automated lead nurturing, software that tracks leads' online behaviour and nurtures them with personalised content. The authors note that providers claim it improves conversion but that whether this benefit materialises is unclear. Across one qualitative and three quantitative studies they found the average effect on the probability of conversion ranged from none to 23 percentage points, depending strongly on sales cycle length, expected sales volume and any existing relationship with the seller.^[3]

Limits of the evidence

Several limits apply. The Harvard Business Review piece is a short magazine article, and the full methods of the audit and of the 1.25 million lead study are not set out in the text read. The audit covers US companies, and the article reports no UAE or real estate sample. The Habel study concerns business-to-business sales firms. Neither Journal of Marketing abstract reports response times measured in minutes, so on the evidence read they cannot confirm or refute the hour-level results above.^[1][2][3]

Association is not cause. Firms that respond quickly may differ from slow ones in other respects, and none of the sources read reports a controlled experiment on response time. Higher qualification rates among fast responders are therefore evidence of a pattern, not proof that speeding up any particular business would change its results. Widely repeated figures such as five-minute rules are not used here, because no primary or peer-reviewed source for them was opened.^[1][3]

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