I read the study you linked and it did not say that the SAT was a poor measure of performance? What it did say was that in isolation, the SAT score was worse th

I read the study you linked and it did not say that the SAT was a poor measure of performance? What it did say was that in isolation, the SAT score was worse than GPA, but the overall best predictor was a combination of SAT and GPA. I think this agrees with other studies about hiring, FWIW, where, as I understand, the best way to measure somebody's ability is a work-sample plus an IQ test. As someone who has been involved in hiring, we crudely approximate this by looking at work experience and how selective somebody's college education was.