Yes, on my Yokohama A509's.
Was hovering on 35 - 40% tread left. One night when I was going home from work, we got about 1" of snow on the freeway... :shock:

Fortunately, there was practically nobody else on the freeway at the time (except a WA State Patrol cruiser who was ahead of me). Was still a eye opening experience when both myself & the WSP were both trying to go up a 1 - 2% grade on a freeway... sideways......
This is what happens when you try to drive in the snow on Performance Tires that ARE NOT M+S rated....
Didn't bother putting the snow tires on the next day, it warmed up a bit & the snow melted.
Have "actually" had good sucess on BFG Radial TA's in the snow "when the tread is still brand new"..... But they do suck when the tread get's below 50%...
Have not had the opportunity to try the Yokohama Avid S/T's yet.
Hrmm.. Here's something that I may be HATING come next year... Was watching the Noon news today.... 50/50 possibility that studded snow tires may become illegal next year in WA State.... Will either have to pull the studs out of my Dunlops, or only use them if the snow plans to stay around/below freezing for more than 5 days...

Then again, I have not had the opportunity to use my snow tires in the last ~4 - 5 years, either the snow melts overnight, or we get a mild winter w/ nothing but rain.