Neither the SEC and nor the Pac-12, the two best conferences during the regular season, won a BCS bowl game. But they nonetheless led the AQ conferences in bowl record.
The SEC was tops, going 7-3, despite Auburn losing the national title game to Florida State and Alabama losing the Sugar Bowl to Oklahoma.
The Pac-12 was second at 6-3, despite Stanford losing the Rose Bowl to Michigan State.
The ACC went 2-0 in BCS bowl games, but it only finished 5-6 overall. The Big 12 and Big Ten split BCS bowl games, with the Big 12 going 3-3 overall and the Big Ten ranking last among AQ conferences at 2-5.
Of course, a lot of this is matchups. As that the Pac-12 was favored in all nine of its games, that has to factor in how the bowl record is viewed. The Pac-12's only win over a ranked team was USC over No. 20 Fresno State.