Well I'm on my second winter with the non-D. I can't find any issues with it or icy corners spelling trouble. The stability control never lets the rear end move much.
The one observation I have made though is that the regen does a better job slowing you down on ice than the brakes. I would imagine that a D car with all wheel regen braking would be even better. I have scared myself when transitioning to the brakes on ice as the anti-skid seems to be much more primitive and slow at cycling the brakes compared to the more precisely controlled regen deceleration.
Anyone with a D care to share their experiences on ice?