I read on an AI site that 90%+ of Normande cows carry the B Kappa Caseine gene - increasing the cheese yield 15-20% (other sources claim 10-15%) and 82% of the AI bulls are BB. Normande milk is used for Camembert, Pont-Lévêque and Livarot cheese in France. One site is claiming that many Normandes are producing 22000# of milk per year with some individuals breaking 30000# but that seems high(??).
My interest in the breed is the same as Dave's - good grass conversion.