According to Nate Silver of FiveThirtyEight.com, divorce rates tend to be higher in states that have enacted damndable constitutional amendments preventing gays from marrying than in those states that have not. In Massachusetts, the divorce rate has declined 21% since 2003 and is the lowest in the nation. It seems that marriage equality is good for marriage.
Don't expect NOM or Focus on the Family or any of the other haters to acknowledge the divorce gap. The notion that they are fighting to save marriage from us dirty queers is a pleasant-sounding lie. They could care less about the institution of marriage. They're fighting to make sure we don't have rights.