The more things change, the more they stay the same, with one or two notable exceptions.
Three weeks into the 2013 college football season, a handful of the best offenses from 2012 are once again sitting atop the rankings. Even with modest turnover on the depth chart—and one drastic change on the sideline—the highest-powered attacks from last season have carried over.
But that's not true in every case. Some of last year's best units have struggled to open the new season—not in the grander scheme of things, but at least relative to expectation. They've been good, but they haven't lived up to the lofty precedent of 2012.
It's still early, so there's no reason to sound the alarm. But if they want to catch up to their peers, who haven't missed a beat, they need a quick return to form.
Note: The five offenses graded were the BCS leaders in yards per game last season.