We don't know is the only real answer. But the number of people prepared to tell interviewers they are gay has gone up a great deal in the past few years. And the number of self-identifying same-sex couples has leapt in the last decade as well - across the entire country. Marc Fisher has the stats and a link to the PDF report from UCLA's law school. The five gayest cities in America? San Francisco, Seattle, Boston, Portland and then Washington, D.C.