that actually happened to me when I swapped to Winter's this week too...
I was going to post about it, but kept on thinking I was "seeing" things when the DSC light popped on.
It's odd, but yes, heavy throttle with winter tires seems to inspire DSC. I'm going to dry deflating the tires a little...(more contact patch might help??!)
2012 335i Mineral Gray
M Performance Exhaust/Brakes/Suspension/LSD|Bav Stage 1/AMP||ER CP/IC/DP/OC | Dinan CAI/N55 PWG BIG TURBO|BMWF30.com