It is interesting how different our experiences are regarding this issue. I live in one of the top 15 cities in the U.S. in population size, and I don't know any same-sex couples, married or not. None. There are no gay people in my husband's family or mine. Actually, I only know a few gay people casually and they aren't in our circle of friends. They are acquaintances. So, that poster's comments don't seem off to me, but I do realize that everyone has different environments.
It'S actually kind of a running joke with some of my friends that I must be a gay magnet because I have so many queer friends. No particular reason why, that I know of.
My dad' cousin grew up in and taught kindergarten in rural Texas. Yep, an out gay man teaching kindergarten in rural Texas 15 years ago. I love seeing his former students post on his facebook page about how much they loved his class and what a great start to school they had as they head off to college now.
A few friends I still keep in touch with from highschoo--we all grew up in and around Boulder, Colorado.
Friends from the metro Detroit area
Friends we met living in a small town in New Hampshire (several couples we met there)
People DH works with who are from New Hampshire, Mexico, Germany, Italy . . .
People who are mostly my parents' friends who live near them in Mexico
People we met on the DIS and at Disney and on cruises and formed ongoing friendships with (who live in smaller towns in upstate New York, New Mexico and Texas, big cities like Vegas, Dallas and Boston, etc)
My own kid
Generally--I really do not think it is all that geographic, and my own experiences support that--though there may well be areas where people feel more comfortable being themselves in public than in other places and perhaps there is some reason people feel comfortable being out around me regardless of where they live or the prevailing attitudes there.