I can say without any reservations whatsoever that the stock tires are basically worthless in snow.
Thus why I just upgraded to Cooper AT3s...love them so far. We got about 7" here I think, not as much as they predicted, but enough to play around in on the way to work. Not even a little slippage with the Coopers, even in 2wd.
That car was horrible! I've lived in IL all my life. I know how to drive in the snow & I put that car in the ditch more times than all the cars I've ever owned combined! So I'm looking forward to actually having a vehicle that can handle a little white stuff on the ground!