Because None of Them Left the Red
I found a few people on MySpace that I went to high school with (strangely found through a trackback on one of the Big Progressive Blogs) and most of them are Married or Divorced. (Heteros, let's be clear.) It really shows me the divide, the blue state red state divide, on marriage. I know very few people here in NYC who are married, much less divorced, in their twenties.
Another thing: I remember a few people I went to high school with who were married then.
What's interesting to me about it is that these were a lot of the drama club/goth/punk/hippie/pothead/alterna-nerd/anti-preppie folks and I feel certain that, if they lived in NYC, they would not be "married" but would be "shacked up". In other words, the definition of marriage seems to be different out there. It seems to be what people who are committed to each other do. Whereas here, I know a whole lot of heterosexual couples who've been together 3+ years (some as many as 15) and would not consider being married, but would also not consider breaking up.