I beg to differ. I think that age is a huge factor in one's preferences, be it art or not. I believe that the older one is, the more he/ she would be drawn to serious, not necessarily realistic, visuals. Outside of this forum, most of my friends have told me exactly that: Brink's graphics dont bother them, but they find them a bit TOO cartoon-like. oh well, no point going against the majority.
I think its more accurate to say that peoples preference in art is defined by how liberal or conservative or liberal a person is. I dont mean it in a political sense, just that some people like the old way, and other people like to see things going in a new direction. As people age, they tend to become more conservative, which is where the age correlation comes from. However, there are older individuals who are liberal and younger individuals who are conservative.
If you had everyone include if they were more conservative or more liberal in general, it would probably line up really closely with the poll. More closely, I predict, than the ages line up.
I think your bias in the quote above ("drawn to serious visuals"; implying that other preferences are less serious) shows that you tend to be a conservative person, which lines up with your lack of appeal towards the artstyle in Brink. Not that being conservative, or even having a bias, is bad; everyone sees things shaded by their own opinion, its just how people are.