I'll admit occassionally doing it, but being self conscious about it for a bit. I don't fool myself thinking that it makes ME faster... but it makes clean-up and healing after a wreck much easier.
Showing off my roadrash from a wreck last year, one co-worker said -
"Hmmm, if you were a woman, you'd have awesome legs!"
Then, word got out that the boss had great legs.
However, I prefer leg hair that is trimmed rather than shaved...not nearly as self-conscious about it...this may be an interim step for those guys who won't go all the way.