At first glance, it doesnt seem that run/pass ratio is a factor either. Yes, those teams had fewer rush attempts, but the total plays were low as well. Would that be accurate?
There are endless variables with any team stat. For example, I'm using rush attempts. That excludes pass attempts which affects total plays per game. Seems reasonable a team that passes a higher % of the time has fewer rush attempts. Not just teams so bad their TOP is bad. No way to easily factor in rush attempts in 1Q vs. 4Q. Since the discussion focuses on Y/C and rush attempts, that's what I used.
NBP focuses on efficiency - a legitimate stat and I don't disagree with him. I focus on if the lack of a run game affects how often an OC uses PA.