Overall, I would say that the Celtics did not look good. No, I am not panicking, it is one preseason game played half way around the world, but 33% from 3 on 61 attempts? Not pretty. Tillman hit a couple of 3s which is promising, but he looked clumsy trying to finish near the basket and was just OK on defense/rebounding.
As to some of the new comers, Springer, Walsh, Scheierman all looked meh. I didn't see any of the 4 minutes that Walker played. Again, not worried, just stating the obvious. Springer at least is an NBA-level defender. Walsh was/is tentative, still not comfortable with the speed of the NBA game, but he is young still, I have not given up on him. Scheierman so far, between summer league and this game, has shown nothing that I have seen. He looks nervous to me. So far, has not shown he belongs at all. I am less optimistic with him than Springer or Walsh.