The one thing that has always puzzled me on these threads, is for those that average around 19mph, how exactly do you measure that? I ask because it takes me around 11 miles to warm up and fellow club men / women at least 5 or 6 miles. If someone leaves the house for anything less than a 30 mile ride and averages these speeds I can only suggest that they may be damaging their health.
I've just got back from a relatively short 26 mile training ride, I'm injured at the moment [gets excuses in] but nevertheless on a rolling course for the first 9 miles my average was only just over 15mph and didn't get settled into a hard rhythm until well after that, in the end I finished with 17.52mph average.
The next bit is a request for one of the fast people to run a forum ride and advertise it as a quick ride, ought to be quite a few takers, yes?