There are 117 Division 1-A football programs. The average ranking of the SEC team in Total Defense is 31.83. The next best conference is the ACC with an average team ranking of 33.75. The Big-XII is next with an average team ranking of 43.75. The Big-10 team average is 74.73, and the PAC -10 team average is 82.30. Based on the average team rating the SEC plays better defense than any other conference.
The SEC has four teams ranked in the Top-10 for Total Defense statistics, and ten of the members are in the Top-40 teams.
I guess the answer to your question is yes.
So do they have good defenses against able non-conference opponents, or do they have such good general stats because they have generally lousy offenses?
How about the stats for offense?