whatithink
GOLD
That's what I meant by my biological reference, i.e. they hit puberty sooner and get bigger, faster & stronger. Both my kids are late bloomers, so she's the smallest on her roster of 18 bar one kid - she's prob 9 inches shorter & 30+ pounds lighter than the biggest player. My son has been giving up, at the extremes 10+ inches and 50+ pounds in his head to heads. They will both catch up and it will level out.My son and I have been watching a series of U12 boys games from Utah premier and gold for kicks. There's one team that he really loves called Wasatch. The one thing you see time and time again on the dominant teams is that they are taller. Taller= bigger physical presence and greater leg span. It's not just maturity....the difference in growth over just 1 year at that age can amount to quite a few inches.
Bigger, faster & stronger doesn't mean better obv. but it does give an advantage and way too many coaches will go for it first every time.