[xyzzyz]

Not sure what your point is. My point is that controlling for SES is useless in context of the predictive validity of SAT. Regardless of the degree in which socioeconomic factor casually influence test scores and educational outcomes, you get no substantial gain from learning them above what you learn from test scores alone, as long as the goal is to select students who are most likely to learn and succeed at your university.

This means that admission officers who want to learn about SES of candidates in addition to learning their test scores usually either are looking for something else the student’s aptitude for learning and ability to succeed, or are completely unfamiliar with state of the research (this is sadly quite common, and this is often willful ignorance too).