I live in anchorage, alaska and the roads can be pretty terrible here too.. I have a GT2 with the 19s and pilot sport tires currently on. I've been waiting for two weeks for my winter tire and wheel combo, patiently waiting while the stinger sits under a blanket of snow. Yesterday I just couldn't take it anymore, and decided to drive it to work. Long story short, it did fine. Comfort mode supposedly gives you your best awd for bad conditions, but I have very little experience to say whether or not this is true. There are a couple things I can tell you though; lots of stopping distance on these tires. Even at idle, the car has a tendency to feel like it's trying to push forward against the brakes. Going down my driveway, which is very steep and icy I literally had to slip it into neutral to prevent sliding...
Next thing I've noticed, throttle input is stiff. Much stiffer than my past two cars (both audi). Feather the gas on ice, which can be challenging if you're used to a softer pedal, like I am. The first two times I pulled across lanes on icy roads, the tail of the car came out under what I thought was pretty light pressure of the right foot. Also the power may not "spool down" immediately after initial take off. I felt like taking my foot off the gas didn't cause a simultaneous drop in engine rpm, that it was a little slow to let off. Even with the summer tires, the car climbs icy hills beautifully with no signs of slipping or fish tailing. I attribute all of its looseness on icy surface at the moment to the summer tires. Looking forward to my ice wheel and tires!