Maybe not Gard's best, but I think playing the best going into the tourney.
In retrospect, having Howard Moore's car accident, not being able to start integrate Potter until right before Big Ten play, Alando Tucker manipulating things behind the scenes, and the Kobe King issue, it's actually fairly impressive that they were able to tread water.
That said, they were 13-10 overall and 6-6 in the Big Ten following a blowout loss in Minneapolis on February 5. They didn't lose again.
Granted, their schedule certainly lightened up a TON too, but I think given all of those other factors, I think you can say the way that team ended the season was more indicative of their ability.