I find it odd that so many of you have this problem. I haven't received my winter tires yet so I'm driving an 08 outback on stock tires in deep snow, compact snow, slush, and ice. I haven't noticed any problems other than issues stopping because all seasons aren't meant for snow and ice. Maybe the problem is I come from a highly modified rear drive volvo with a detroit ez-locker that is extremely tail happy but very controllable.
My suggestion for all of you is go to a parking lot that is clear of obstacles and try some emergency avoidance maneuvers. I've heard it said many a time that the problem is not with a piece of equipment but instead with the loose nut attached to the controls.