Yep. What causes these accidents is a person drifting into the slush, turning back to the center of the lane, the tires slide in the slush, the driver steers more, finally the tires either catch grip or slide back onto the dry surface and whammo, all of sudden you're doing 50 miles per hour on the highway with your wheel cranked over hard enough to spin the car.
Edit: When that happens all you can do is keep the throttle steady (or slowly let off of it), gently turn the steering wheel and wait for grip to return. Any sudden movements are just going to fuck everything up. If the car is completely unresponsive and you go off the road then you were going too fast in the first place.