I had a 2001 3.0 with 19" style 132 with maybe 40-50% tread on continentals and that thing was sliding all over the place in heavy NYC snow. Hard to keep it straight. Now my 04 4.8is with half decent tires was a champ in the snow. As long as your light on the throttle given all the torque its pretty well planted on the road.

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Current
2006 BMW X5 4.8is Dinan S2 Black on Black

Retired
2004 BMW X5 4.8is Black on Cream
2001 Bmw X5 3.0
2006 Bmw 530i
1996 Bmw 328is
1994 Toyota Landcruiser
1989 Bmw 535i