You know what? I friggin hate you for being right.
I put my snow rims and tires on my car two days ago, and torqued all lugs to 100FTLBS. The front warping is nonexistant, but the rear is still a bit prominent once the rotors warm up.
So, thanks! you saved me $12 for resurfacing the front rotor now I just gotta swap the rear with a resurfaced one, and i'm set to go!