I will say though, for as many people who post here freaking out about "keeping below X carbs", I'd say people misinterpret the carb curve regularly. It seems like people are under the impression that for primal to work, they need to eat below 50 grams of carbs.
This is not the first poster for VLC to not work and to interpret "primal" as "very low carb".
It's a confusing concept- the average American eats a way too many carbs at the expense of fat and protein. MDA kind of balances that back out. Then too many people interpret it the other way- that we don't need carbs. Most people need ALL 3 macros in a decent balance.
I also think the whole low carb flu confuses people because there is this idea that when you go low carb, you feel like shit for a few weeks (carb flu) but then you magically all the sudden feel great. So how long do you wait?