Paleoanth is right, why make an announcement per se? If he's curious about what you do or don't eat, he'll ask. Telling him you follow such and such a WOE is making a big deal of it. You already told him you avoid starch and sugar, he probably just thinks you're health concious. If he thinks about it at all. Come on, he's a guy, he probably doesn't care one way or the other!