NBA Opening-Day rosters for the 2012-13 season 64 players -- ACC (Florida, Georgia, South Carolina, North Carolina, Virginia, Maryland) 57 players -- SEC 53 players -- Pac 12 53 players -- Big East 40 players -- Big 12 25 players -- Big Ten
NBA rosters don't indicate college team success as the original comment about SEC football dominance suggests. They might produce pro players but that doesn't make SEC basketball any better.
Using this logic, Miami and USC are the best College football teams. http://espn.go.com/blog/pac12/post/_/id/45123/usc-cal-among-top-10-producing-nfl-players
from 2002-2008, USC went 68-9 for a 88.3% win pct, #1 in the NCAA over that time from 1998-2003, Miami went 64-11 for a 85.4% win pct, #1 in the NCAA over that time but yeah, just because you pump out the most talent, doesn't mean you automatically are the best team, but the point was that the black South does help the SEC and ACC in getting talent, even in basketball (even though they have to split it among the two conferences)
How many players from 1998-2003 are even in the NFL today? Not many. I don't agree with the race argument. If you want to argue a football culture, fine, but color of skin doesn't matter. We'll have to agree to disagree on it's impact.
Sure it has, there are just more competitors in basketball. The three leagues with the most NCAA tournament appearances are the Big East, the SEC, and the ACC. All three fit neatly into the same demographic pattern of black population in the southeast. Kentucky, North Carolina and Duke are the preeminent programs in NCAA basketball. Where are they located . . . right in the black belt.