They are ahead of schedule. And they are one of the best surprises in the NBA this season. “The plan was always to win. The plan was to be better in January than we were in November and to be better in March than we were in January,” Pistons general manager Trajan Langdon said. “I always told my people, ‘I don’t know what that’s going to mean ultimately, but that’s what we’re going to set out to do.’ “But to say that with 10 games left we’re going to be at 40 wins, I would have lost that bet.”