Notice the graphic "defense held opponents to 15.5 PPG during 6-game winning streak."
What they are not pointing to here is the three losses to P5 teams where the offense couldn't put up more than 14 points per game. They are a lot like UofSC; a decent defense but the offense kept them from winning more.
I'd be willing to bet there's going to be a double digit difference in the number of points put up by SECW teams versus that of SECE teams by seasons end. The east, in a sense, is still stuck back in 2010.