Yes it is. At the top anyway. And a lot of the schools are absolutely huge, which is what helps keep the quality high year to year among a few schools. Top 8 schools based upon CalPreps 5-year dynasty rating with their 4-grade enrollment #s.
Center Grove 2521
Cathedral (private, sub6A) 1099
Carmel 5286
Warren Central 3821
Ben Davis 4499
Avon 3095
Westfield 2334
On average, 45% of CG’s schedule (regular and post season) is against those 7 other schools.
This also is part of the explanation as to why CG runs the wing t so much. They entered into a conference with BD, WC, Carmel and a couple other huge schools 20 years ago. They didn’t have the horses those schools did at the time. CG was only a 2000 student school with a mediocre tradition. The head coach showed up from FL and basically built the program from bantam up running that offense. He needed something that could be run without a consistent stable of horses schools like Carmel or Ben Davis have from sheer numbers. The deception in the wing t and running it precisely could mask those deficiencies. Well, the program has been built. And there is open enrollment in Indiana now, so they could get a decent number of football move ins. They’re deviating slightly from the model, but it’s still their bread and butter.