The Pistons' 107-106 win Wednesday at Boston was an up-and-down referendum on size. The smaller Celtics burst out to a 42-23 lead in the first quarter by beating Detroit to the ball and to the basket. Their play was an example of why small ball usually prevails -- when one team downsizes, the opponent usually has to go small too in order to keep up. Before the game, however, Boston coach Brad Stevens wasn't sure whether the normal rules of engagement would apply against the big Pistons. "I've never seen a 3, 4 and 5 like it," he said. "I was saying to a coaching buddy of mine that they can post up at 18 feet with a four-inch advantage -- and they can do that against us at three positions."