I will add a few facts:
1. Clemson plays in a weak conference. Therefore, they can target big games, which is what SEC teams provide. If Clemson had to play SEC teams throughout the course of a season, that would be a tougher road for them. You yourself said back in June that South Carolina had "a tough row to hoe" in the SEC. It would be no easier for Clemson.
2. Many of those 14 wins came at the tail end of Spurrier's time at SC when he was going through the motions on his way to retiring. And a bunch of them were also against us when Muschamp was the coach at SC.
3. The SEC may have been down this year. BUT we beat teams, Oklahoma, on the road and Texas A&M (and possibly Missouri) , not to mention non-SEC foe Clemson on the road, who had better player talent than us, based on recruiting rankings. And we came within an eyelash of beating Alabama on the road and LSU, who also had better player talent than us ( we gave those 2 games away).
I suspect that 99% of Carolina fans would agree that Clemson in the SEC would be a much, much tougher task for them to handle. And if we injected Clemson fans with a truth serum, they would say the same. In the ACC, Clemson's road to the playoffs is a done deal from the get-go. In the SEC, there would be no guarantee of them making the playoffs.
None of the above is meant to slam Clemson. I am just trying to be honest about the situation they would encounter in the SEC. They would be better off being a part of the ACC.
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