Yes I'm faster this year, and stronger. I'm basing this on the rides I do with my two ATF clubs. In one instance, I moved to a group that rides at a 19-20 avg speed from an 18 group. In the other instance, the entire lead group is riding faster this year, moving from a 16-17 group to an 18 avg speed group (hilly ride). With both groups I've substantially increased pull time, roughly double what I did last year.
Since this time last year, I made three changes:
Lost 35lbs
Changed wheels from Xero Lights to Ksyrium Elite
Rode weekly through the winter.
I'm sure the improvement is due to the Ksyrium Elites.