First of all, read the wording that they're using "the Celtics are going forward as if the affable center won't be returning to team for the playoffs", that's not any new news. They have already decided that so that the team could concentrate on what matters, playing with what they have. Shaq isn't any different, he's day to day. Consider that they're using evidence from what occurred on Saturday's practice, we already know about that and the status of the situation back then. Nothing has changed from a team focus perspective with the information that has become available to us.
This paper is not using any news that we don't know, other than maybe citing a source that is drawing some conclusions from information that isn't any different than what we already know.