Rode with two others on the W&OD between Vienna and Herndon, today. 50F, not too windy and only 1 "climb" of brief duration.
according to the dude riding the carbon equipped with a garmin, we gained 690ft, or something, our avg spd was around 17(decent for an MUP), highest sustained speed of 23 mph. from experience, i could tell that he and i broke 40 on a couple of sprints. i was on aluminum, my friend on italian steel(Denti), and our third was riding De Rosa carbon. that's a damned fast bike and i think he was being nice to us considering he blew past me while we were all out of the saddle, on the steepest ascent.
So, 20+ miles with some slushy patches(most recent reminder to not suck wheel during the winter........) and i got to burn carbon on a sprint.