You get those guys that could get up - have no breakfast - go to the gym, have maccas for lunch, pizza for dinner - whatever and they are still lean, gaining size, strength etc - but this is like the 1-2% haha - and this is where alot of fads branch from - you have a very small group of people that do something and yes it works but for the masses - as Donnie Brasco would say "forget about it"
Eat clean, eat healthy, eat smart, train hard - give it your all and shit will happen.