Really? You're doubting Chan Gailey as a QB evaluator? Reggie Ball sucked ***, sure, but he made Reggie better than he was. Maybe if we had Gailey here, Chad Henne wouldn't suck as bad as he does.
Chan Gailey made Kordell Stewart servicable. Gailey may not be a great HC, but he knows something about quarterbacks. Hell he made Jay Fiedler look decent.