Drew Brees won the 2011 NFC South Positive Impact Factor (what's this?). This was one of the toughest divisions in the NFL to win in terms of how well quarterbacks performed using the PIF.
Here's the 2011 NFC South Positive Impact Factor Standings (PIF with sacks counted as rushes like the NCAA in brackets):
1. Drew Brees, New Orleans Saints, 51 (57)
2. Cam Newton, Carolina Panthers, 47.5 (49.9)
3. Matt Ryan, Atlanta Falcons, 36.5 (44.7)
4. Josh Freeman, Tampa Bay Buccaneers 23.6 (31.5)
Drew Brees led the Saints to a 13-3 record and recovered from a PIF of 25.6 last season. He did this by reducing his rate of interceptions and fumbles lost while cranking up his touchdown production to 6.9%.
Cam Newton had an amazing rookie year for the Panthers with 35 touchdowns and 19 turnovers. What the Heisman Trophy winner did well in college he continued to do in Carolina. The level of competition knocked his sky high 70+ PIF from Auburn down but he still performed among the best in NFL this season.
Matt Ryan fell from a 44 PIF (6th in NFL) in 2010 to a 36.5 this season. His 2011 season resembled his 2009 season. Ryan's touchdown production was up a little from last season but so was his lost fumbles and interception rate.
Josh Freeman, like Ryan, had a disappointing season. In 2010, Freeman's PIF of 49 was 4th in the NFL. He had made a huge stride from his PIF of 11.6 in the 2009 season. His touchdowns came down and his turnovers skyrocketed from 9 in 2010 to 27 in 2011.