I must admit I really want it to snow, I'm interested to see how well the 4Motion works on the R
Do not get too excited about 4WD in the snow because as much as it does give you some additional control and more so the ability to get you moving you will still be like Bambi on Ice if try to drive around normally or try to get up an icy incline.
Basic physics of tyres not gripping the surface no matter how many wheels are trying to help you!
Had 6 years of Audi Quattro prior to the GTD and you do really still have to be as careful as everyone else.
If have winter tyres with 4WD then that would obviously help a lot but most tend to stay on same tyres all year round.
The Quattro were on the older frame which was quite a bit heavier so not sure what the 4WD is like on new frame but just urge some caution when first go out to get feel for the real ability in them conditions.