The problem with that survey is that it is so two-dimensional, like a right-left survey of politics. According to that survey, I'm a "0" and thus a boring heterosexual. A more interesting survey would add more axes to the results, perhaps a Y-axis that measures your amount of "vanilla" vs. "kink".
Yes, I'm sure that people would select answers to make it appear like they have a more interesting sex life. ;-)
Chuck