The ACC hasn't produced a champion for a variety of reasons. Most point to parity. I would also point out bad coaching at the programs most positioned to compete on a national level (FSU, Miami, Clemson). Virginia Tech has carried the torch for the conference, but usually have mediocre offense -- which hurts their overall record and the ability to deliver in the BCS. But there is nothing the conference "can do" to help things. Even if the middle of the pack rolled over against the big boys, the non-conference foes won't comply. It is now just a matter of someone stepping up and the ACC ignoring the criticism. No one seems to mention the Pac 12, Big 12 nor Big Ten hasn't produced a national champion in six years. Why should we be so thin skinned?
The ACC will produce a champion again. But to do so, we have to stop thinking like a conference and hope that the individual teams step up.