I figured that he was on his way out of there, to take advantage of the market created for him and his career by the positive performance of his team and the negative issues at some premier programs around.
I speculate that the back channel conversations have gone on with him and that is why he is holding tight.
I see the following NFL teams needing a coach (and I don't do this speculation a lot or well)
Miami (this is where I think Harbaugh lands)
Possible NFL turnover
New Orleans (that team got bad in a hurry)
I think Kelly heads off on his own...interesting that the bowl game is the day after the end of the NFL season.