Well... quite frankly if you fit just 2 to the front, then you are very very silly indeed! Youll be going backwards in no time at all!
I wouldn't recommend it to others Rich, no, but daft as it may seem on paper I got on absolutely fine in a car with 350NM torque before my Stage 1 map on them. I never had a problem where the car was out of control because of the tyre setup and the two up front simply meant I never got stuck.
It simply meant if you pushed for stupid inevitable oversteer, it came more controllably with a bit more weight but made fun time (off road) a lot more enjoyable
Hill starts weren't a problem in fairly thick snow and I could snow plough through fresh snow when it was over a foot high, so job done.
But for peace of mind, four winters' would indeed be the wise mans game