Even if it were true (and who knows, maybe it is), that would tell us nothing without the larger context. How about comparing data among people offered the same opportunities? Problem is, opportunities don't exist in a vacuum. So if you could create a statistical sample in which people were starting from a level playing field, and then you were to compare results, you might have some kind of interesting data. Otherwise, all you have is a statistic, which can be manipulated to mean whatever the statistician wants.

I get so aggravated when people cite statistics to back up a proposition (implied or explicit) that has nothing to do with the numbers they're quoting.

Peace.