Taste in music has nothing to do with the size of your wallet or your educations level. It's a function of what kind of music you are exposed to in your formative years and then you as an individual build upon that exposure. Music like any form of art has to elicit an emotional response in order for it to be appreciated. Emotional responses are NOT determined by the size of your bank account or how many books you read or how far you have gone in your education.
The conclusions drawn from that survey were complete bull cookies. It was just another way to label people.