Anyone have experience with the Proxes 4 in the snow?

 

yes. don't push it. drive like you're on ice. however, it's a ton better than the t1's. t1's don't let you move. proxes-4's let you move a little. they are not a winter tire. just an all-season tire - an ultra-high performance all-season tire.
i'm not doubting your common sense, just offering you enough information to hopefully help you avoid the surprise i got when i came reeeaaallly close to hitting an underpass. i wasn't even going that fast. hope this helps.