I had the same kind of fights two weeks into being primal. No one would listen. 7 weeks in, and lots of results, and them doing their own research, to confirm what I've been saying, and I have a couple converts. What's even better is I have several playing with primal ideas in the closet. They don't want to admit that I was right, but they are sure watching their diets much more closely. That's the power of the example.