I would love an answer from the AD. I have said publicly, I that I think it's in Tennessee's best interest to either hire Gruden this week or put the possibility to bed and move on.
As for why it seems unlikely it depends on what source your talking with. Some say it's money (particularly if he is making as much as Chris Morentsen has indicated). Others say money isn't a big factor. Some say it's control that Gruden wants too much control. But no one can really explain what that means.
Some say that ultimately Gruden wants to coach in the NFL and some close to him think he will be unhappy in the college game.
All the while, Gruden is saying nothing definitive to anyone which has only fueled the speculation and while multiple sources have told us no way he ends up here. I haven't completely slammed the door on it only saying that sources say it's unlikely. Because neither Gruden nor Tennessee will say or indicate anything definitiv