I agree that those traditional formations appear to be more physical approaches but I submit that the formations speak more to mentality than actuality. "Toughness" is simply a mentality. People either have it or not. Handing the ball off to a fullback on a dive play is arguably no more "physical" or "tough" than running a reverse with small wideouts that are running their a--es off. I guess what I'm saying is that its all relative. But I understand the argument on both sides.