In the CLE series, PP didn't score much because he was focusing more on defense. It was the same thing last night only he was focused on team defense, not just one man. There were several times where it was PP that rotated off Artest to pick up a big man and eliminate a pass for a lay-up. In most cases, he did his rotation and got back to Artest. This was a big part of the better overall defense.
PP will be a factor in the series but it may not be with points. He missed some pretty open shots on Sunday which can't continue but I suspect he will get his points when they are there and that he will continue to otherwise help the team.