Well we have had some snow in the uk, not a lot but enough to test these in. In cold conditions my PA4's have been great. Excellent grip and makes driving in icy cold conditions feel safe.
In the snow they are unbelieveable, i just had to see at what point i could lose traction as normal driving did not see any dramas at all. The tyres performed as though there was no snow!
Foot to the floor sees some traction control but also rapid acceleration in a very controlled way. I can not recommend these tyres highly enough and the added safety margin they give over normal summer tyres in cold/snowy conditions is worth buying them for.
You have to really push them to lose grip.