Some really frank comments from ACC assistants. I think this one is spot on:
"It was overrated," another ACC coach added. "I'll admit it. We won games in November and December, but most of our teams weren't that much better than teams in the other leagues. But we had a ton of résumé wins on the board because of Duke, North Carolina, Louisville and even Virginia -- and that allows the other teams to become overrated."
Again, that's a function of the RPI. Strength of schedule is pretty much set by the end of December, and, since there are no meaningful non-conference games between January 1 and March 1, the RPI has no real mechanism for judging in-season improvement (or stagnation). Teams that were good in Nov. and Dec. (or even teams that just picked up a big win or two) become a "quality opponent" for the rest of the season regardless of what happens in January and February.
IMO, that's one strong reason for deemphasizing the RPI in favor of metrics like Pomeroy that pay more attention to how well teams played than just who teams played.