Back to the original question, sort of ....

I think some people do have a very fluid, pleasing riding style. I've noticed that some people who whizz by me at annoying rates of speed look like they're expending no energy whatsoever. Their backs and shoulders seem to be barely moving, their legs are going in very smooth circles - and it is a very pleasing sight to me. Could be a man or woman, doesn't matter. Helps if it's a guy with nice calves, tho.

Whereas some people who bomb past me have backs and shoulders bobbing all over the place - they might not be in their death throes but they sure look it.

I notice different riding styles even among the pro racers on TV. For instance, I always thought Ivan Basso moves his back and shoulders too much (but less so recently, he seemed to have worked on it), while Bobby Julich has a very quiet back and seems to glide effortlessly.