@Catvalente
I always believed that they meant it showed that marriage can be successful. Most of the gay couples I know have been together for much longer, and have more successful, rewarding, relationships than the straights.
E.g. my brother and his husband have been together for 30 years almost, I've been married 3x and divorced 2x.
(This is mostly tongue in cheek for the example, my unsuccessful relationships don't have anything to do with my brother's successful relationship)
@nolsen311 Yeah but people were saying this in the late 90s, and in that time there were TONS of straight marriages past the 30 year point.
Because divorce used to be way harder than it is now, but they still pointed to those as the successful ones