Since Dr. Abraham J. Twerski’s parents were cited here as an example, and somebody used the word “abuse” to express their reaction, I would like to make a statement specific to this family.
The Twerskis of Milwaukee are known for being extremely stable, down-to-earth, caring and agreeable people. They are actually quite exceptionable in their capacities of interpersonal dealings and approachable leadership. That is neither a reflection, nor an endorsement of the way their parents were married. It is simply a truth.
It is my opinion that their incredible talents and reputations may very well be a reflection of their genetics (nature) AND certainly their nurture (observable middos passed down). Ask (almost) anyone who deals with these people on a regular basis. I have been thus fortunate.
I can not say, for certainly this is only known to Hashem, but it seems to me, that having such middos passed down, AND being extremely aware of it (as they are, incredibly without ga’avah), might make for a successful marriage despite the young chosson and kallah not knowing each other before.
As far as their next generation, since they are normal people, and quite insistent on being normal and approachable, it is understandable that not every shidduch involving the offspring of the parents was successful. Every situation is different, and every individual, if raised in a healthy way, is a separate entity with an independent personality. I am also quite sure that their children definitely saw/met their respective spouses, some more than others before their shidduchim, despite their strong and proud adherence to their mesorah.
Again, this is neither an endorsement, nor even a study of the format of the senior Twerski’s (Z”L) form of pre-marital introduction. It is simply a statement meant to maintain the high regard that I, and many others have for this wonderful family, who have given, and continue to give of themselves, publicly, as well as very privately to others. Would that we would have more such examples of Kiddush Hashem amongst us!