I am a numbers geek, and getting over that 20mph average when you factor in the stops is hard. I have my GPS set to pause when stopped, and even with that, stopping at red lights then accelarating back up to the 18 to 20mph crusing speed is going to kill that 20mph average fast. My goal this year is to make it home in less than an hour at least once, my ride is 19.8 miles home, not much in the way of climb, it's mostly flat to downhill, but the city here and the lights kill that. It only takes hitting 2 or 3 lights red in the middle of what would otherwise be 20-22mph blowthoughs to kill any shot you have at that 20+mph deal. Below is a screenshot of my fastest this year- and I was booking.