I check out BB.com on occasion.
What you need to keep in mind though is that its a different crowd on that site. The focus over there is on bodybuilding where many of the people on this forum really focus on optimal health. Big difference.
In the context of bodybuilding, "if it fits your macros" does work, and to an extent so do conventional wisdom low fat diets too. Just look at all of people that still eat that way and you will find some that have managed to build excellent physiques. My point is not saying one is better than another and for the record I think a mostly primal diet is the way to go but its just silly when paleo/primal die-hards frown upon other diets that also work too.