I do think the bust rate, as a percentage, is mostly the same no matter where you look. Some schools will be better than the average but for the most part, the percentage of busts in the WPIAL is probably very close to the same as Miami or DFW or SoCal. It may be even better since the borderline kids in the WPIAL aren't getting as many second looks as kids from those areas.
I think there may be a little truth to the FL 3-star but not because they are as good as a PA 4-start. I think it's because they have seen enough of the FL 3 and 4-stars that they are a little more experienced in competing against that talent. Being a superstar RB in PA probably means you haven't had to shed a tackle from a piss missal of a 200 pound LB that can turn on a dime and doesn't value their own life. Goes to what I was saying about the level of competition.
There's no doubt the competition is drastically different. I just think sometimes fans think these Rivals recruiting guys are sitting there watching hours of tape to put these rankings together, when it's just not true. A lot of this is from the Rivals camps these guys host where all the studs are going up against each other. Then the tangibles such as size, weight, 40 time, etc. play a big role in it.
But I'm sure it's a combination of all factors, especially when considering that not everyone does the camps.