To be fair to Tony, he clearly stated that this was a text from a friend of his that he knew to be close to Mike Hamilton, that the source was a Marine (so he was confident that the source wasn't lying to him), and this is third hand information about who Mike Hamilton (who may or may not actually know anything) was saying Tennessee would hire. He didn't report it as "this is what's going to happen." Tony is a fan like us, and spent 7 hours on the air today talking with listeners about the coaching firing/hiring, which is a great public service to our fan base.
As far as Frost goes, he is pretty close to this year's Tom Herman, with a similar caliber of suitors as Herman had last year. Nebraska is where he played (after transferring there from Stanford), but that's no certainty that it is his "dream job" anymore than Tennessee is for Tee Martin. What's more, Nebraska is ready to fire Mike Riley this year, if Frost doesn't take a job there and chooses Tennessee, then we should feel pretty good that he isn't going to Nebraska any time in the foreseeable future.