100%. This is why as I've said before I've stopped listening to his pressers. He literally says nothing, every time, and that doesn't appear to have changed since I stopped watching them. Which doesn't translate into 'he has nothing to say because he has no idea what's going on', rather it's just as you said - he chooses not to tell the media anything.
Here's the thing I wonder with that - Sweeney not wishing to give much away to the press is all well and good, but what about the fans, who in the end are the actual audience? This is where I need some local guidance. In Australia's major sports, there's still a sense in which the paying members of a team 'own' the club and have a right to know what management are doing, what their plans are and the rationale behind particular decisions and courses of action. In reality there's still a lot than is hidden from the fans, but there is at least some sense in which team managers are accountable to the supporters. But is it the same in America? Does Sweeney have any sort of obligation to keep the fans and STHs informed on what's going on inside the Bruins, or does he have every right to run a closed shop and keep them largely in the dark?