Actually, when the rules regarding traveling, palming, ups and downs etc are in force, black guys are generally awful. Witness their horrible play against teams in the WC's and Olympics the last decade or so. However, the rules are not enforced much in college or in the NBA at all so that the black players can wow the fans by taking off 8 feet away from the basket going for a dunk or dunking after taking 5 or 6 steps through a crowd of defenders - without dribbling. That's the way it is. Different strengths, and right now in the US they cater to black strengths - jumping far (not really high, but far) and straight-line running speed. If the rules are enforced and the game caters to shooting ability, free throw ability and true ball handling, then it tilts towards whites.
The pendulum swings back in forth in sports over the decades. Take a look at boxing. Today, from 160 lbs up, dominated by whites from Europe. From 154 lbs on down, dominated by hispanics from Mexico and Central America. American blacks are trumpeted in the media, but only a few of them are doing well against 'foreign' competition after they had a few decades of domination - just as the Italians and Irish had their runs at the top. This is most noticeable in the heavyweight division where fast hands and to be honest a hard head have been replaced for the most part by pure power and an ability to cut off the ring, which the Eastern Europeans have demonstrated. All the talk about US heavyweights being in the NFL are bunk, as there are more fighters in the US than ever. The problem for the US fighters is that there are now more fighters than ever from everywhere else. Fighters who haven't been brainwashed by the media to give up or be scared of blacks, like most whites in the US. The hispanics are tough as Hell and take it as an insult to lose to American blacks whom they think are big mouths who like to run away.