Yes, the SEC is completely overrated as a "top to bottom" conference almost every year. The reason why is actually quite simple.
1. Every year the SEC has at least 1 world-beater team that is the best team in college football by a large margin. Some years they have 2. Which means when those two teams show out in the BCS and kick the crap out of their championship game and/or sugar bowl opponent it validates the conference. As the article points out... the weird thing is when Alabama loses to Utah or Arkansas to Ohio State... somehow the narrative is "other team got lucky" or "wow what shocker!" or something to that effect.
2. Most SEC teams play NO ONE outside of conference. It's really a joke. Florida plays FSU, South Carolina plays Clemson, etc.... but that's usually it. There are almost always at least 2-3 pure cupcakes on every SEC team's schedule. Therefor, at the end of the year, their records are always inflated.
3. The bottom half of the SEC is often a joke.... just like the bottom half of any conference. So the top 4-5 teams every year finish with somewhere near 7 automatic wins. Just look at Georgia this year... Buffalo, FAU, Vandy, Kentucky, Ole Miss, Auburn, Georgia Southern, Georgia Tech.... that's 8 teams who SUCK. Those are all seriously crappy teams. Georgia plays EIGHT of them. That means even if Georgia was totally average... they would get a minimum of 8 wins... and the kicker? They get lauded for their oh so tough SEC schedule... what a farce.
To take is a step further, the top of those 8 games they get two against average Missouri and Tennessee teams... and then two legit games against Florida/South Carolina. So they can go 0-2 against legit teams and still finish 10-2 with credit for "playing a tough schedule." Compare that to ND... who has to play at least five legit teams (Stanford, USC, Oklahoma, Michigan, Michigan State) plus three average teams (BYU, Miami, Purdue) and then four bad teams (Pitt, Boston College, Wake Forest, Navy). It's ridiculous. And once they start objectively weighting SOS in the playoff formula it'll finally count against these guys.