re: should it matter how big of a high school a recruit goes to

While measurable are important, they are not the end all be all. The mental game is more important and it's hard to judge that mental aspect in shitty competition where a kid can just get by on his athleticism. Bigger schools tend to have more complex schemes and more competition for playing time.

It's easier to be amazing when you don't have to look over your shoulder knowing your backup could take your spot in lower divisions.