Took my first ride with my new wheels and they seemed to provide a harder ride than my old Easton Circuits. However I also changed tire and was running Gator Skins so I don't know if the ride is related to wheels or the tire, it is probably both. The harder ride is not so bad that I would go back to the Eastons, though I will try a pair of Conti Attacks in the spring. During the cold weather the extra flat protection of the Gator Skins seems more important than a harder ride.
They do seem more efficient at high speed and head wins. I was able to hold 21 mph on a long flat section with very little effort.