While I consider biochemical and evolutionary science to be the most compelling argument for eating Paleo, something that I also find super compelling is the abundance of success stories out there. But the devils advocate in me has always wondered about the other side. There's just got to be people out there who tried paleo but quit--and not necessarily because they failed (re: Melissa's "faileo"), but because they felt crappy or didn't like it.
For example, I have one friend who tried paleo but is attributing his continued blood pressure problems to the diet. I have some more suggestions for him, but he's adamant.
So my question is this: do you know people, either in real life or via the internet, who have sincerely tried paleo and swear that its ineffective/harmful/stupid/etc? And why do you think that is? Did they just not do it properly, or was it truly bad for them, or did they just not feel any benefits worth raving about and therefore quit?