By the time Spurrier got to Columbia, the rest of the SEC and college football had caught up to his offense. When he arrived at UF, he brought an offense no one in the SEC or in much of college football had ever seen. The SEC was a "three yards and a cloud of dust" conference dominated by big, fast running backs and road grader OL play. 10-15 passes in a game was considered borderline "wide open play calling". If a team could score 17 points, they stood a good chance of winning the game. Stout defense really ruled the day.
Spurrier brought in multiple wide receiver sets and forced mismatches where linebackers were having to cover wide receivers or running backs coming out of the backfield. Other teams had no answer for the offense he brought for quite a while. 6' 185lb slow white linebackers stood no chance trying to cover a WR or RB who had a running start. Once the other SEC teams adapted and/or new coaches came in who weren't married to the old school style of football, Spurrier's success started to wane. By the time he got to Carolina, every team in the SEC was running and defending similar offenses as what he had brought in 1990.
It's crazy how quickly the game evolves. He left the game in 2001 as pretty much the undisputed offensive mastermind. He came back as an ok offensive coach. We had some good offenses and some great offensive players, but nothing that was going to wow anybody. He could still dial it up and call a fantastic game, though. When anyone thinks of those teams from 2011-2013, though, defense is what comes to mind. Kudos to him for adapting and being able to adjust without having the huge offensive edge he was used to having at UF.