Psychogeography and personality clusters in the U.S.

Here's an interesting link to an article in the Boston Globe dated May 4, 2008 where Richard Florida documents personality clusters within the U.S. He maps the concentrations of neurotics, extroverts, conscientious types, novelty seekers and agreeable folks. I find the concentration of neurotics in New England to be particularly funny... and surprising as well. Could it be the number of graduate degrees per capita? What doesn't surprise me is that both New England and Southern California are full of novelty seekers ("open to experience" people).