...Reacting to other people's blog-posts, because what i have to say is too long for the "comments" section! :-)
Jimmy Moore is calling attention to the rift in "ancestral dieters," wondering why people who consider themselves carbohydrate-agnostic feel the need to place a demarcation line between their contingent and what he seems to consider the majority, if not the mainstream. I think it's all about cliques.
It looks to me as if the young, slim, athletic portion of the paleo/ancestral group don't want to share their clubhouse with middle-aged fatties. We're just not kewl enough to belong to their club, so they put a new password in place -- MACRONUTRIENT AGNOSTIC -- and if you're not sufficiently pro-carb, the gate will remain closed against you.
The paleo-primal "movement" is wanting to feel like it's a grownup, because it's been sneered at for being a fad, a pseudo-scientific reenactment community of muscleheads, and it wants to prove itself worthy of its health-and-fitness claims. If there is a large contingent of older, unfashionably-chubby folks in it, i suspect they think the whole group will look like a failure and a joke. Therefore, they have to limit membership to those who fit the stereotype.
The biggest problem with the notion, i believe, is that some people will get bent out of shape because of it. Like the lady at the AHS who felt left out.... Face it, in every group of every sort there will always be those who think themselves toocoolforschool, and trying to enact the twentieth-century rule of Everybody Gets to Play just doesn't work. We're not in a publicly-supported venue, and clubs don't HAVE to accept everyone.
Why do you REALLY want to belong to their in-crowd anyway? I'll bet the conversations aren't very interesting ... just like it is with most hipsters.