[yummyfajitas]

...that is less true (and eventually the opposite of the case) for blacks with higher SAT scores.

From the cited article: "Blacks with the highest SAT scores and high school GPAs...are those underperforming the most.

Do you have have data showing the opposite? Note that your source on the other thread did linear regression, so it can't possibly capture this effect.

No, my real critique is that the assertion that without AA, existing admissions would be meritocratic is unsubstantiated...

Your sole evidence for this is a source stating that SAT and GPA are good predictors of college performance, but SAT and GPA plus a penalty for black people is even better.