This would all be true if it was Joe Smith, a non Catholic from, say, west of the Mississippi, or a Dan Mullen, but this is an Irish Catholic from Boston... it is a DNA thing. I doubt that he would consider any other (perhaps U$C) college job a step up (that his considerable ego would allow him to take), unless the lynch mob was on his heels (e.g. if he had gone 4 & 8 this year).
I think that an East Coast Pro job (Philly, NYG, or especially the Pats) would draw him. That said, even though there is one born every minute... No, he is here for another 3 - 4 years, then the toll will tell, as with Ara, and as they say, He Gone. Until then he is here.