Not to say they are bad tires. they are descent, I sell them where i work. They dont' have the best snow traction. They seem to "clog up easily". The design of the tire doesn't spin the snow off the best. They have lot of good sipping for ice though, which is a plus.
Pilot sports are awesome, and would have bought them if i had the money too. Damn they are expensive, and have no millage warranty. I put on Firestone Indy 500's as my winter and all season tire. They are white letter which looks bad ass, and they have great snow and ice traction. They came with a 50,000 or 60,000 mile warranty. Can't remember for sure. Thats Wear warrany only too...
Triple tread goodyears suck in the snow. No matter what they say, they have No tread block to chew threw it. They have sipping, and good water channeling, which its ideal for southern applications. Along with an 80,000 mile warranty.
Another good tire i recommend is the BF Goodrich Radial T/A, its been around so long and provin its realiability. Also comes in White lettering too, which i am quite fond of. 50,000 mile warranty. Its to bad i didn't see this thread before to give you some info. I live in ND right next door and know what the weather conditions can get like there too. You should be allright with those tires you got, just still be cautious.