I don't like it, but I also don't think this is happening. This is another subtle (and possibly brilliant) ploy by Stern to cause some cracks in the union. The important part of this story is not that guys like Pierce, KG, and Kobe were front and center in crucial parts of the negotiations, but that it is being portrayed like Hunter is not really in charge.
Stern has taken up this latest campaign over the last week or so, making subtle comments that suggest Hunter is being cut out of the crucial parts of the negotiations.
I believe he is hoping that some of the players will hear these things, start to panic a little, and tell their leaders that they want them to get a deal done NOW, before the wheels come off.