I already get the feeling browsing the MMO-Champ and official Blizzard forums that people are already tired of Dragon Soul. And while the MoP Press Tour, did show a lot of highlights that are upcoming, it also sheds some light some speculation on how far away the expansion is. It looks as if beta is still a few months off, then of course launch a few months after that. Late summer, August\September at the earliest (personal guess).
They've already stated that there will be no "filler" raid content, leaving that just more Dragon Soul, which again, the general feeling is it's already getting stale.
I didn't find the right solution from the Internet.
http://www.mmo-champion.com/threads/110 ... id-content