SEC winning 8 isn't really anything super special, only been a few years since that's really been possible due to the inflation of bowl games. SEC tends to get good match-ups and quasi home games in bowls in their own backyard (they may as well have played the Sugar Bowl in Oxford).
When I say good match-ups, I mean that they tend to 'play down' as in each SEC team tends to face teams lower on the totem pole in their respective conference.
This tends to happen because they play so many bowls vs the Big Ten and Big Ten teams are probably the most popular picks for bowl committees due to their large and travel-enthusiastic fan bases. As a result it's fairly common for SEC #2 to play Big Ten #3, SEC #3 vs Big Ten #4 etc.
Take this year, where because of OSU going to the Fiesta, Big Ten #4 Michigan played SEC #3 Florida, Big Ten #5 Northwestern played SEC #4 Tennessee, then because Wisconsin went off to play USC out in California, Big Ten #7 Penn State was left to play SEC #5 Georgia.
The Big Ten tends to end up in really the toughest bowl match-ups because they ironically do too good a job securing attractive bowl tie-ins.