Yes I feel my tires slip when things are wet or slippery, but I don't have a sense of which tires slip more under a given condition. Maybe my technique is different from others. I was riding with a friend who warmed me sternly about the wet leaves on the paved trail. He told me to take it super easy. He was really scared of flipping and falling, but I wasn't. Then later we realized that he's heavy and I'm light, and maybe that has something to do with it. Maybe my reflexes are good enough. But I can't remember slipping on wet pavement when there is nothing loose on it.