Year2 looks at the numbers and makes this interesting point:
"I don't know if we can chalk all of the improvement, especially in points, up to the defense alone. Georgia committed three turnovers in each of these games last year, as opposed to one turnover in each of this year's games. That helps out any defense. In addition, Georgia's punt coverage is a little more than four yards per punt better and its kickoff coverage went from allowing 25.71 yards per return in '09 to 17.57 per return this year. These two combined have resulted in about 40 yards of field position saved per game."
It's worth the read.