I would have to disagree with the fact that most in the gym that are big, are also genetically gifted. In my opinion, genetic freaks are pretty damn rare. The guys who are big, that you may or may not agree with their training methods, are nothing more than examples that multiple training methods work. Even following typical bro-science can get you rather built, sadly.
It just goes to show that consistency in the gym, and adequate food, are pretty much above all else.
The Greatest Respect You Can Earn is Self Respect.