So there are at least two interpretations of this data (I'll admit I skimmed a bit torward the end). 1) The SAT is measuring things other than academic ability

So there are at least two interpretations of this data (I'll admit I skimmed a bit torward the end). 1) The SAT is measuring things other than academic ability/achievement, particularly non-academic cultural differences between a significant portion of the cited minorities and those having more success getting into SAT-mandatory institutions. This seems to be implicit in many calls for diversity. 2) The SAT IS a good measure of academic ability/achiement/admissibility, and statistically speaking, the cited minorities just aren't as likely to have the requsite levels of whatever academic oomph the test is measuring, presumably for environmental reasons.