Bullet, I don't know exactly how are counting TV sets; though South Carolina is a comparatively smaller state, its population is quiet dense, and it is growing. South Carolina and Clemson both have 80,000 plus seat stadiums; nothing like that at any of the NC schools. Of those that are very close by, only UGA and Tennessee (near bordering state) match/exceed.
The SEC is not going to give up ITS footprint in the Carolinas with Univ. of So Car., particularly since the ACC expanded with Miami, Va Tech, and already having GT and FSU. The Charlotte (near border SC), Greenville/Spartanburg, Columbia, and Charleston (even Augusta & Savannah, GA) markets have a lot of TV sets, and plenty of fans that both the ACC and the SEC partake of.
If South Carolina (a charter ACC member), had not gone into the SEC, expectations are that they would have been in the Big East. South Carolina and the ACC did not have a happy divorce three decades ago.
As to the general topic, I tend to think the merit of must having a school in Florida is getting overrated. Sure it is important to the SEC and the ACC, and I suppose the Big East, due to fewer good options last year. C-USA and the SunBelt got picks there too. However, the Big 10, Big 12, and PAC 10 will survive just fine without a "Florida" team. It is not the only state that produces a bumper crop of fb players.