It's completely spannered my weekend rides, not because of the weather but because it's so bloody dark in the mornings when I have to go. I don't fancy going aris over tip in a pothole because I can't see where I'm going at 7am.
Doesn't stop the commute, of course. I can see the potholes there (and I have suspension to take care of it if I do happen to hit one).
Anyone who professes to enjoy cycling in the snow obviously doesn't ride anywhere near urban secondary schools.