Coaching is the answer to all of them, but that doesn't mean IU is analogous to all of them.
1, 2, and 4 are located in talent rich areas, in major conferences, and have traditional football support. Their natural ceiling is higher than IU's.
6 is pretty unique with their support from the largest apparel brand in athletics.
3 and 5 are pretty solid comparisons. Basically, they have good administrations who have spotted and hired coaching talent that can compete amongst their peers week have more structural advantages. NW has had Barnett, Walker, and Fitzgerald. For a couple reasons, Cincy's run is more impressive with the hirings of Dantonio, Kelly, Jones, and Tuberville.
It's a simple concept, yet tough to master (and understand for many of our fans).