I think that in this particular case, we don't have enough information. From any of the involved parties. There are three sides to every marriage: his, hers, and the truth.
I can honestly say that I used to think the EastFacingNorth about marriage (see his post above). In fact, I firmly held the belief that I would marry the love of my life and stay with him until death. It didn't work out that way at all.
Now, I am in no way chiding EFN for his stance. In fact, I find it admirable and I hope he makes the decisions in life that will help him achieve those ideals.
My point is that you never know what you're going to get in a marriage. But most importantly, you never know how each of you will deal with those circumstances until they are put in front of you. It's not only who you choose to marry, it how you choose to act.
I can also say that your choice of spouse can make or break your marriage when a crisis hits. I have the advantage of comparision though. I'm now remarried and it's like night and day. We have weathered some pretty bad storms. Some that would have crushed my first marriage instantly. This one has only gotten stronger.
You can chalk that up to more than just a good match between spouses though. Maturity, experience, honesty, committment, etc...a good relationship takes many components. It's like an orchestra. Every instrument must not only play, it must play correctly in order to make something beautiful.