David Carr 4,839 yards 344/533 46 TDs 9 INTs
2007 QBs 2712 yards 215/343 15 TDs 5 INTs
2007 total offense 5454 so the 2007 offense had 615 more yards than Carr did passing but yes they improved.
You missed the point. The point was that he improved the offense from last year. And if he improved the offense that is CAPABLE of putting up the numbers that it did when Carr was there, then Bama made a good hire.