Mike, you might be correct in your physical development point in the heaviest division 275 but I think that would be the only division it would be valid. At the high school meets I have attended, I would have to say that I thought the 215 class looked to be a very high level of physical development. I have seen very few freshmen competing successfully at 189 or 215, but I have seen a lot of successful freshmen at 103 and 112. At the same time many of the 103 class although looking great as far as quickness and cardio capability, I would not place very high on the physical or strength side of the equation. Some 103 kids are well developed strengthwise, just as some 275 kids are in pretty decent shape.
I was looking at the numbers last year though and it was overwhelming the amount of underclassmen in the lower weights vs. the upperclassmen in the heavier weight classes in the State tournaments. I just think it is pretty much a given that it is more difficult for a heavier freshman or sophomore to achieve success than a lighter weight one. Just compare an in shape 189 freshman vs. an in shape 189 pound senior. I will put my money on the senior. I know you could say the same thing about a 103 pound in shape freshman and senior. You are not going to find that many 103 pound freshmen, but you will find a lot of 189-215 pound seniors.