Why do schools keep hiring people with a history of jumping from job to job? These schools deserve their mediocrity because they hire guys that have been in 3 or more schools in a 10 year period...sometimes shorter period of years with that many schools.
What's missing in everyone's responses, while I like parts of all of them, is simple: Do the kids want to play for said coach and are both player and coach building a life long relationship? Sounds corny, but this is how I'd measure a successful coach.
If it is Kurt Young, who I don't know, is there a point when schools, parents, and kids start wondering why he's bouncing around so much for most of his career? He's not the only one, it's just an observation.