Some teams have it, some don't. The Boston Celtics had it during the regular season when they steamrolled over every team in the NBA. Since the playoffs started, however, they only seem to have the Swagger when playing at home. This means they only appear unbeatable on their home floor. For a team hoping to win a championship, that won't cut it.
The LA Lakers, on the other hand, have it. They've faced tougher competition, but have won each series convincingly. Now they have the defending champs on the ropes, and they have a look eerily similar to the Chicago Bulls of the nineties. The look that says "you can't beat us."
Make no mistake, I'm cheering for the Celtics all the way. But if I were a betting man, I'd put my money on Kobe and Co.