There's a time and place for trash talk, and the ACC Kickoff was neither for Tom O'Brien.Did the Wolfpack coach casually drop “41-10” into the conversation when he saw North Carolina coach Butch Davis in Greensboro earlier this week?“No,” O'Brien said. Did O'Brien feel the need to remind Davis that he was 2-0 against him since they entered the rivalry together before the 2007 season?“No,” O'Brien repeated.