My thought is he has built up enough good-will with the state, university, AD to warrant the extension. I thought 10 years was too many but in this day and age of recruiting I can see why.
I dont think he is here in 5 years or less however. I think he gets out before too long and really wants his son Brian to be in position to get the job. We will see how it plays out but would be shocked if he is there past 2020.