I agree that the company has a reason for keeping us in the dark right now. Good or bad reason should not matter as the CEO should know shareholders are not happy with the communication as it is now. Driving the point home that if they can't answer questions that do not affect the NDA then they know we know that they are trying to keep us in the dark and I think that may be as important as getting questions answered.
Is the PR firm the problem or the company that tells the PR firm what can be released? What kind of communication is the PR firm getting from the company now? It's pretty hard to answer questions or write articles if your not given information.
All the best,
Steve