I read some rumors on here about maybe Stewart coming back as a DC and there was some mixed reviews. Considering the defense he inherited and that we averaged 1:43 avg per scoring drive (I think that was the average but definitely under 2 minutes), the defensive stats were fairly good under Stewart.
For the season 22.4 points/gm
http://www.cfbstats.com/2011/team/288/scoring/defense/split.html
Other interesting stats: