I think it shows you just how hard it is for everyone to come together and fit in as a group. Not to say they didn't click when they won in 2008; however, I think Ray's shooting success is very much a product of him finally being comfortable in his role. I think in his Seattle days he was used to getting the ball on every possession. Then the past few years here, he might not get the ball until the last few seconds of the shot clock when someone finds him in the corner.
Also, it doesn't hurt that Ray, at 35, might be one of the most well-conditioned players in the NBA.