I think we're missing each other. Domination comes and goes, and the SEC is currently on an unprecedented run. What I'm saying is that the SEC has always been regarded by most as the most consistently tough conference in the country. That doesn't mean we don't have down years, or that other conferences don't have great years. But competition in the SEC is typically tougher than anywhere else, and has been for as long as I can remember, for all the reasons I've listed. It doesn't mean we are better than anyone else. I think this is where non-SEC'ers get their feelings hurt or something.
Also, the SEC hasn't always had a long list of dominant programs nationally either. LSU and Florida both had very little success nationally prior to the 90's. The same could be said for Georgia and Tennessee. Auburn has never had a national presence in terms of championships. Really only Bama was a national power, yet they teams have been consistently big and caused problems for others outside their conference.
Now, in the last 20 years or so, the rise of LSU and Florida has been remarkable. Throw in that Tennessee and Auburn have also won national championships in that time, along with Bama of course. We've seen Ole Miss in the top 10, Miss St in the top 10, Arkansas in the top 10, South Carolina in the Top 10, along with Kentucky and Vanderbilt both in the top 25. That's quite remarkable, and spans a period of time much larger than the last 4 or 5 years which really should be longer. Never mind that LSU won in 2003, and Auburn should have played for the championship in 2004, many thinking they would have won.