I think Troy won owing to several factors, including his 2005 campaign and his ability to lead which, in my IMO was something he demonstrated on the field his entire career. I have to admit, when I looked up Troy's numbers I thought "Gosh, those seem low... I seem to recall 2006 Ohio State's offense being explosive, dominant, etc.." and the numbers don't seem to support that memory, lol. In any case, while this seasons defense has not been what we Ohio State fans have grown accustomed, I'm not so sure your remark about offensive dominance is accurate.
2006 Bucks scored 34.6 per contest and averaged 384.5 yards a game.
2012 Bucks score 40.4 per contest and average 452.4 yards a game.
These two numbers aren't the full picture, of course, but I would argue that this year's offense has been "dominant" at least in terms of comparing it to 2006. Ohio State has scored over 50 points 3 times in 7 games already this season. In 2006 the Buckeyes put up 50 only one time, against Northwestern, and topped 40 points 4 times in 13 contests, while the '12 Buckeyes have already gone over for 3 times. Because of the '06 Defense, the MOV was much larger (there was a two game stretch where the Buckeyes won 44-3 and 44-0 (Indiana and Minnesota) for example) for the 06 squad and maybe that's why you regard the 06 offense as more dominant?