Interesting responses so far! Studies like this one always seem to draw slightly dubious conclusions from the data that they collect. I would have liked to see some more of the study and I would have liked to take a peek at the demographics, the religious backgrounds of the participants and what the cultural mores are for those groups.
I agree that you should not take on a spouse that needs "fixing" and that you and your spouse should have similar goals and habits. Hubby and I are polar opposites when it comes to certain things, but our goals are pretty well aligned. I think that our strengths and weaknesses are pretty well balanced.
According to this article, I was too young when we married but hubby is 12 years older than I am. We also didn't fit the educational portion that is cited. I met him just before I started college and we dated for months, not years. Education is continuous for us, which (I think) allows us to grow together. This seems to be the culture of the area that we live in and we are surrounded by lots of colleges, universities and trade schools. We live in a fairly affordable area of the country, so we were able to afford a home and a few luxuries along the way. In other words, we have been blessed to not have alot of the struggles that some other families have endured. I think that strife can either draw you closer to a spouse or shatter it into a million pieces.
In our case, divorce is essentially not an option. That doesn't mean that it is completely off the table as I would divorce him if I ever learned that he cheated and vice versa. For the most part, we would try our level best to work anything else out.
My husband and I do not share the same faith, though we try to live our family motto of 'Do the right thing for no other reason than because it is the right thing to do.'