long engagement or whirlwind romance?

I'm personally a big fan of long engagements. It gives the future bride and groom both a chance to plan their lives together, diffuse any potential problems, and to plan the wedding itself, of course. The idea of a whirlwind romance is romantic, to be sure, but I'm not sure how logical it is in this day and age. Too many people view marriage as something they can just 'stop' if things aren't working out and it's a very irresponsible thing to do, IMO.