Not only is this meme old, it is patently false.
More often than not, BC has decent offensive lines. Addazzio rode a strong offensive line and running game in 2013 (you may remember that Andre Williams received an invitation to the Downtown Athletic Club?), and then combined the O-line with Tyler Murphy last year. UConn has not been able to put together either of those combinations since at least 2011.
Franklin's wins in year 1 were Elon College (5-6 FCS), UConn (5-7 and sinking), Ole Miss (2-10, scored 7 pts or less 5 times), Kentucky (5-7, scored 10 pts or less 6 times), Army (3-9), and Wake Forest (6-7). Combined record of Vandy's opponents in wins: 26-46, 0.361 pct.
In 2012, Vandy started 2-4 before going on a 7 game win streak against a down Auburn team (3-9), UMass (1-11), Kentucky (2-10), Ol Miss (7-6), Tennessee (5-7), not-as-spunky Wake Forest (5-7) and NC State (7-6). Combined record of Vandy's opponents in wins (including Presbyterian who was 2-9 in FCS): 37-72, 0.339 pct.
Just by virtue of playing in the SEC, Franklin had a better roster than what Coach Diaco inherited, but he didn't exactly lay the wood to the SEC either. Not for nothing but looking at Franklin's first year in the Big Ten, a case can be made that Franklin has been doing it all with mirrors. He did beat UCF (So did UConn), but his other wins were Akron, Rutgers, UMass, Indiana, Temple and BC. Good for him. I hope Coach Diaco fakes it until he makes it to a 6-6 record too, but Franklin is not exactly an apples to apples case study.