^ Yes, but a good driver would avoid getting sideways in the first place, and correct for it if it happens. Most of the accidents I see in the winter are due to stupidity (car starts sliding, driver either does nothing or hits the brakes).
This winter, I watched a guy 180* an Escort into the ditch right in front of me. He hit his brakes lightly down a hill, rear end started to slide. He let off the brakes, but didn't take any other corrective action, and spun around and slid sideways into the ditch. If he had tried to correct for it, he would have been fine. He described his reaction as "you know, when you start sliding, and you just sit there waiting for it to grab". A good driver would make it grab.
Things like that are why I'm a firm believer in at least once every winter, taking your primary winter vehicle out to a smooth, empty parking lot in the snow and playing around a bit, to keep yourself in tune with how it feels in a slide, how it corrects, etc. I've had sudden 90* snaps occur on an ice patch in the winter before, and recovered them just fine without coming close to flipping, as I had already started correcting before the Jeep started to catch traction.