Well Boise State has had 4 coaches now all having a high level of success in a row. Not a single one having the same sort of success anywhere else. Once is an anomaly, twice is Deja Vu, 3 times is a pattern, and I think we are looking at another pattern.
Boise's unique success has hinged on a few things. Low academic standards, low surrounding competition (Wac/MWC competition), and the unique weird setting. Whole area revolves around that football team, the blue turf etc.
Take those unique advantages away and well...the results have not matched. You can chose to ignore history, but it has a habit of coming back again and again.