Interesting! Probably true, but as already touched on, there are just way too many contributing factors that need to be controlled to make a definitive conclusion.

I married 21, and I'll admit it's been a rough ride. I've changed tremendously since marriage/engagement in ways that some husbands would not approve of at all. I'm young and in college, what do you expect? =) But we're together, and in love.

But I can understand it leading to divorce. One of my cousins married young and is getting a divorce on the basis for "marrying with the wrong intentions." Too many young people probably do the same!