How did this turn into "Rich kid, poor kid"? Doesn't matter where or how you grew up. Kids who want to succeed will and always have. Now if we are going off kids who want to wrestle as Freshman, (Who have never done it before) then yes, they aren't going to do well against wrestlers who have been doing for years. No matter school size, public, or private.
Example; I went to a 4A School in the late 80s early 90s. Never wrestled before my sophomore year. Got my ass kicked first year but came back for more. 2nd year drew the likes of E.K. Franks and Johnny McCreary, still got killed but stuck with it. Was I a state champion NO, but I grew to love the sport an am still coaching today. FYI I was the poor kid. But wouldn't change a single thing.