Anyone from Brooklyn has heard of the Shadchanit “Sara Richards”. She has years and years of experience. That being said we can be sure her words hold a lot of weight.
Regarding one point in letter I can speak from personal experience. I myself “ripened” before I got married (not by choice 😉 . The single years were that of tremendous growth, learning and maturing. Holding down 2 jobs taught me responsibility, loyalty and dependability.
Additionally, my husband has a friend going through some Shalom Bayis issues now, some of the stories he tells, insinuate not a lack of middos, but a basic lack of maturity.