What you can't seem to wrap your brain around is that many of those guys started from day 1. Romo first started in like day 1001. Comparing their stats to Romo is meaningless. Staubach had many games where he threw 15 or so passes, while Romo usually throws double that many.
What's relevant is looking at the whole picture. How good the defense is, what the record is, and yes, most importantly, what happened in the playoffs. If you pull out his #s before December, they're phenomenal. Probably the best in the game since he took over. Unfortunately, they don't play the Super Bowl on Thanksgiving weekend.
Bottom line, the Cowboys have started strong and finished weak every year Romo has played. His career is severely lacking until he turns that around. It's not as though he's played fantastic, only to have his teammates let him down. Like last year in Philly and in Pittsburgh.