Dear QCL,
My advice to someone reading, wondering about her prospective partner, would be ACTIONS SPEAK LOUDER THAN WORDS with regard to any lines used by the prospective partner.
Let “him” show “her” first, let him prove himself, observe how he interacts with siblings, how he treats others, including any service providers, if he runs down other people to build himself up. She should take her time, in this day and age, they should perhaps live together first, if their beliefs and background allows it.