They said that the dates are subject to change and there's been no official announcement for details. Take a moment to use your logic and figure out for yourself that they probably pushed it back and haven't yet had the time to put out a formal announcement. It's fine to question why it wasn't announced, but not to harass them for working hard behind the scenes.
This is their job, and they have far more responsibilities than just waiting on forum-goers hand and foot. I assure you that responding on the forums is a significantly smaller percentage of their workflow, and making sure that every person knows every detail of what goes on in their office is not a part of it.
Bayohne, Grekumah and all the other reps, on behalf of all of us who appreciate what you guys do day in and day out, I apologize for the rudeness of the others here who do not seem to appreciate it, and thank you for your hard work. Please keep up the good efforts! Know that not all of us who read the forums have time to respond each day, and those who look forward to the community posts far outnumber the trolls in the frontlines (pun intended). =)