Yup. 4WD. Usually quite predictable, however. Understeers when entering a turn, but adding some throttle mid-turn brings on oversteer pretty easily - and usually quite controllably. In this particular case, I wasn't trying to do anything fancy, but it just let go. I was surprised, but my track training kicked in and I stopped fighting it and enjoyed the ride. (The rule of thumb I was taught driving on a track is "in a spin? Both feet in." I.E. push in the clutch to disengage the engine, and lock up the wheels. Then enjoy the ride and brace for impact )

I agree wholeheartedly that you should take your car out to an empty, snow-covered lot to see how it skids. I tried to get my wife to do it with me in this storm, but she was scared. I did do an intentional "panic stop" to show her how the anti-lock breaks work, and intentionally induced both over- and under-steer to show her the difference, and how to recover. There's only so much you can learn, however, until you drive through it yourself!