[gipper81]

And yet, contrary to your assertion, high school grades remain a better predictor of success than the SAT.

Right. Inflated high school grades are highly correlated statistically to inflated undergraduate grades especially at liberal state schools which are especially concerned about inflating the self-esteem of the inflated undergraduate population.

[NittanyLion]

Inflated high school grades are highly correlated statistically to inflated undergraduate grades especially at liberal state schools which are especially concerned about inflating the self-esteem of the inflated undergraduate population.

That may be the case. But nevertheless, grades are a better predictor of college success than the SAT. So the point remains, why bother to use it as a benchmark?