Similar to the NFL and QB arguments I think it is VERY difficult to make comparisons across various eras of the sport, even though people love to do it. The game was once a dominant big man game, that is no longer the case. The rules now clearly favor the offensive side of things and as such the game has shifted to a smaller, more athletic version of itself, dominated by guard play.
"Show me a good loser and I'll show you a loser." - Red Auerbach