Smarter people listen to instrumental music: study. "Study author Elena Racevska, a PhD student at Oxford Brookes University, became interested in how musical preference is tied to personality traits as she learned about the Savanna-IQ Interaction Hypothesis, which presumes that more intelligent individuals seek more novel experiences compared to less intelligent people."
Yes, but what comes first, and how much of wine snobbery or listening to tenure music or going on an environmentally correct safari is a signal in a matching market that isn't a pickup bar? "Racevska and her colleagues surveyed 467 Croatian high school students, and found that those with higher scores on the intelligence test were associated with a preference for genres such as jazz, classical, big band and ambient/electronica."
As is almost always the case, there are opportunities for additional research.