Hehe, or last winter, i was in a nearby city with my old '91 Caprice (with winter snow/ice tires). It was during snow storm, and i was at a light with a 4x4 XTerra beside me, and a Ford Fx4 truck behind me. Both had 4x4 on, because you could see there front tires spin, yet the 4x4 systems either didn't have a rear limited slip, or just were plain awful because my car would walk away from them at every light we stopped at. (Not racing, just navigating in the snow.)
2WD isn't bad, you just need a limited slip (and proper tires too) in order to get the job done.
My '10 SRX with Haldex AWD and a torque vectoring Rear differential does wonders in the snow, and is a beaut with the snow/ice tires on!