It would seem, based on the research, that frummie prevalence of dating strictly for marriage scores us points.
As Tara Parker-Pope reports in "The Decisive Marriage," relationships that came into being through decision-making, as opposed to "just happened" couples, are better off.
Nearly every sitcom I watch now has some sort of the awkward "Is this a date?" premise. Those situations mimic reality, as the article mentions that specific unsureness. Thank goodness, we shidduch-system gals always know that it's a date. (Our opinion on the guy that shows up at the door is another matter.)
Additionally, those who had cluttered romantic pasts did not score as high in marital quality. It had always been believed that the more experience one has (in everything), the better off one is; not so when it comes to romantic relationships. The experience gained leads to comparisons. Conclusion: Ignorance is bliss.
Another thing in frummie favor: Big weddings tend to equal happy marriages. The reason for that is still unknown; one theory is that big weddings involve a lot of planning, and the couple that plans together, stays together.
Since our wedding sizes usually make gentiles gasp (most halls around here have insane minimums), the bigger, the better?