I have had the same problem with my 07 awd. It has 20k on the Hankook tires. I HATE them. The car drives better when I hit the Traction control button. However this is just my DD because I can afford to put 93 octane in my 03 SS Silverado. Now that truck is AWD and handles the road like a champ, I sometimes find myself trying to get the truck side ways. I'm running Cooper 305/50/20's on the SS.
I would have to say that its the tires.. i have noticed when its raining out I can get the Edge to spin the front tires really well if you punch it!!! Just take it easy and try hitting the Traction Control button and see what that does. Just my .02