A new study has come out that provides some interesting data. The original article is here, and Hypebot provides an analysis of it here.
While this may not provide definitive answers, I think the results are intriguing. I was happy to see that Boston was in the top ten of the "Bands With Fans" list! Don't forget to read the comments on both posts as well. I'd be interested to hear your comments here, if you have the time.