SECDEF or Mouthpiece? [UPDATED]

I really did like Sec. Gates. and I realize that he does not make all decisions, he serves a new President and must now carry out President Obama's policies. But recent actions be it the Dover move or this response has disappointed me.

Makes sure that he calls on everyone? What the hell? Is Obama the teacher and the administration his elementary school class?

I encourage every member of the military to take on the mantle of fearless, thoughtful, but loyal dissent when the situation calls for it.
—Dr. Robert M. Gates, 2008
I wonder how much "dissent" SECDEF put up... if any?