Exactly. Fulmer had this incredible loyalty to assistants who either lacked the drive or skill to move up to a higher level, even as they were failing in their primary job.
I came up with this thread a few years ago:
http://www.volnation.com/forum/tennessee-vols-football/96886-fulmer-lack-coaching-tree.html
That was so long ago that I had a post in there that pointed out what a great coach Jerry Sandusky was, without having to qualify it with anything else. Paterno had longtime assistants who didn't move on, but they were still developing a lot of talent and producing All-Americans. Fulmer's longtime assistants couldn't make that claim.