lazersailer,
You have a good point but you carry it too far. Tires can be just as important as driver skill, depending on the particular tire and vehicle.
My firebird handles very well in the snow if I'm on all-season tires, it handled passibly ok on the last set of summer tires I had, but on the current set of summer tires, the car is downright dangerous in the snow. It's like driving on slicks. The last time I drove it on packed snow, even with traction control on when I pulled forward from a dead stop on the freeway, the car just started very slowly rotating instead of moving forward. Before you say I lifted the clutch too fast, I didn't. The car was moving slow enough I could have gotten out to push the car back into line, and gotten back in. With decent tires, the car would have just moved forward with a minimum of wheelspin but on the current extreme summer tires, I may as well be using my race slicks.
It's a shame, because these tires are otherwise the best tires I've ever had on the car. They're awesome in the rain and very grippy and predictable when it's dry. But the tread is 100% continuous angled strips instead of blocks, and that means there is zero snow traction whatsoever. There is no benefit in being a good driver in the snow with these tires because it's not possible to apply ANY power to the wheels without the car just slowly rotating sideways.
As it was, I ended up with the rear wheels on the left side of the road crown, the fronts on the right side of the crown, the wheel turned full left, traction control off, and I just "drifted" that way below walking speed until I got to a patch of road that had been gravelled, at which point the car immediately became controllable again. But for a while I thought I was going to get stuck blocking 2 lanes of traffic... Embarassing. I would have done better taking one rear tire off and mounting the spare just to get off the road, but the storm sprung up while I was driving and dumped about 2 inches in under half an hour, so there wasn't even the option of not driving that morning. UK roads don't typically have usable shoulders (they have little parking areas every couple of miles instead) and the few cars that spun off the road or decided to pull off remained halfway out into the traffic lanes causing an even greater hazard.