I'm not surprised to hear other schools sniffing around, seeing as how Tad has improved, in one place (UNC) significantly, two programs in 5 years. Anytime someone offers you $2mil/year you have to at least think about it, but I don't think Tad's leaving for a 2nd tier Big XII school.
Remember his boss, Mike Bohn, is a college buddy who specifically sought him out to drag the program, kicking and screaming, into national respectability. He's got institutional support, he's in his home region, and CU is putting the finishing touches on an impressive new practice facility. If Tad leaves after only 1 year to a school not named "Kansas", I will eat my hat (and post pictures).
I still think Tad's gone if a significantly bigger school comes calling in future years, but he isn't leaving for only a minor step up, certainly not after only one season. This guy is just window shopping for OU's AD.