Speed to lead is how quickly a new enquiry gets its first real response. It is one of the few sales habits with research behind it and one of the easiest to measure in your own business, which makes it a good place to start improving.
The guides here separate what the original studies actually found from the figures that get repeated online, explain how to find the best time to call leads using your own call log, and show what fast first contact looks like in real estate, where the first callback often wins the site visit. Each one ends with a way to measure your own response time, so you can see whether a change worked rather than taking a benchmark on trust.
Start by measuring where you are: take last month's leads, note when each arrived and when someone first replied, and work out the median gap. Then change one thing, such as who owns new leads after six in the evening, and measure again a month later to see whether it moved.