Study: smart people listen to Radiohead, dumb people listen to Beyoncé

A a software application writer called Virgil Griffith charted musical tastes based on the average SAT scores of various college institutions, to find out "a correlation between musical tastes and dumbitude (smartitude too)" (according to his explanation).

This is the scheme Griffith followed, in his own words:
1) Get a friend of yours to download, using Facebook, the ten most frequent "favorite music" at every college via that college's Network Statistics page on Facebook (manually -- as not to violate Facebook's ToS). These ten "favorite musics" are perhaps indicative of the overall intellectual milieu of that college.
2) Download the average SAT/ACT score (from CollegeBoard) for students attending every college.
3) Presto! We have a correlation between musical tastes and dumbitude (smartitude too)! Music <=> Colleges <=> Average SAT Scores
4) Plot the average SAT of each "favourite music", discarding those with too few samples to have a reliable average.
5) Post the results on your website, pondering what the Internet will think of it

According to Griffith’s chart, Sufjan Stevens, Bob Dylan, The Shins, and Counting Crows are among the favourite bands of smart people. Meanwhile, Lil Wayne, Beyoncé, The Used and gospel music fall in the realm of - as Griffith puts it - "music for dumb people".

Here is the chart: