I will take it further. Not only to more affluent kids get the best dope (they can afford it), but they always did. In fact, some of these affluent kid's tuition is being paid for by what? Illegal income from what? Think I am kidding?
I don't know why anyone buys the stereotype of the (by in large) "African-American or Hispanic, street corner pusher any more. Big drug organizations are and have been controlled by the wealthy, connected, and affluent. May have started with organized crime, but there was a point where their lawyers, government officials, and other establishment officials took over.
Funny thing is these kids didn't get busted until they got pretty big. I wonder who's income they stepped on?