It would appear the toughness question that has dogged UNC over the course of the season has undeniably been answered. Carolina's toughness has been an issue all season but the last nine games would seem to have put the notion that the Tar Heels lack an edge to rest. A quick Google search of "UNC" and "toughness" yields dozens of results, but the content of those results depends on what point of the season you reference.
"UNC Searching for Toughness After 80-76 Loss to Notre Dame", "UNC's Toughness Nowhere to be Found", and "When it comes to toughness and heart, UNC can learn a thing or two from Duke" were some of the headlines from just six weeks or so ago.