I really wouldn't read too much into that stat other than no false starts or offsides (which is somewhat impressive for this team). Arizona wasn't flagged very much in this game either. Things had to get flagrant to draw a flag.
The Carey crew was the crew that officiated the 20+ penalty Ravens fiasco. It wouldn't surprise me if the powers that be issued a loosen up edict in their direction.
That crew did, from all accounts, get chewed out for the laundry deluge. So that might have had SOME effect, but we did not make any really stupid mistakes this game. Hopefully a trend that continues.