I've wondered out loud a few times if we could put together a brief, bullet page style document that discusses why the building blocks of a primal diet are healthy, and why CW is not. Most people will never read a book, let alone something like GCBC. If you put it in a USA Today format that looks easy and everybody can read quickly you might get people to take notice. Of course I'm a hypocrite and haven't taken the initiative to start such a project If anybody has the knowledge, creativity and time to get it started we could all pitch in with ideas.
I also agree that anybody hoping to convert others should do two things...have an NMR lipid profile done when starting a primal diet and do another one after 6 months. Show the results and there's no more conversation. Better yet, challenge the CW believer to do the same.