Both Hayden and Ferentz, I think you could say, much of their longevity came as a result of the timing of their very good teams. Just when you would think they were headed in the wrong direction, BOOM, here comes a 10-11 win team pumping everyone, and CONTRACTS, back up again.
Once huge point is that they would win enough to keep fans in the stands most years. Iowa's fan following most likely helped retain them, even during some down years. This doesn't happen at all places, especially states/cities that have other pro sports vying for fan's $$. See Minneapolis/St. Paul and the Gophers.
The Hayden and Ferentz are very likeable and represent the university well. Is there any other school that only had 2 back-to-back coaches in 39 yrs? That is unheard of this day in age. I wish this stat would be mentioned more on the sports stations or a segment from BTN done on it or something.
Two reasons why Iowa has had only 2 coaches in 39 yrs.
1) Fan support/following for the team - So, if some fans wanted Ferentz gone, they can blame themselves to a point
2) The university's loyality to the coach and to let them fight thru the bad years