May I suggest that you are interpreting what she said incorrectly? If her family wasn't normal your DD would have had no measurement to compare the BF's family to. She was indicating that they seemed fairly well-adjusted and going about the usual business of life in the usual way.
Am I normal? Yes, I prepare meals, enjoy people but on my terms, love doing things and and curious about just about everything which makes life fun. Am I unique and individual - absolutely which is what is normal, IMHO anyway.

I have to ask her about that, but the take-away was: his family is normal, her family is not.