What's the SEC's record in bowl games against non-conference opponents, or record in the regular season against non-conference opponents? I don't know the answer but I think it's pretty damn good. I don't think the SEC is overrated, I think they've earned their reputation as the best. Rankings aside I can see it when I watch the games, the SEC teams are faster, bigger, stronger, and tougher. The number of players that are selected in the draft every year should also be a telling stat. I don't know the numbers, but I'll bet it's alot.
As far as this year goes:
Kentucky beat Miami (OH), lost to Western Kentucky and Louisville. 1-2
Vanderbilt beat Austin Peay, UAB, and UMASS. 3-0.
Tennessee beat Austin Peay, Western Kentucky, South Alabama, lost to Oregon. 3-1
Georgia beat North Texas, lost to Clemson. 1-1.
Florida beat Toledo, lost to Miami. 1-1.
South Carolina beat North Carolina and UCF. 2-0.
Missouri beat Murray State, Toledo, Indiana, and Arkansas State. 4-0.
Arkansas beat Louisiana-Lafayette, Samford, and Southern Miss, lost to Rutgers. 3-1.
Mississippi State beat Alcorn State, Troy, and Bowling Green, lost to Oklahoma State. 3-1.
Ole Miss beat SE Missouri State, and Texas. 2-0.
A&M beat Rice, Sam Houston State, and SMU. 3-0.
LSU beat TCU, UAB, and Kent State. 3-0.
Auburn beat Washington State, Arkansas State, and Western Carolina. 3-0.
Alabama beat Virginia Tech, Colorado State, and Georgia State. 3-0.
That's a record of 35-7. Nice record, but not a lot of impressive victories. Almost all are against pretty weak competition and the conference has lost some big games. You'd have to compare that to other conferences and then look at strength of schedule.
SEC is definitely down this year.