I don't think they've even announced a pre-order yet? So i would say false on that one.
Anyway, we have the Collectors Edition Package announcement out. I honstly think they're gonna give a official release date before they air the cinimatic at games-con, just so they can have more time to build a bandwagon. GW2 comes out at the end of August, so I say they're gonna REALLY push to get MoP out before the end of September. But an early October release is still just as likely.
Someone in another thread pointed out that the annual pass is over October 20th; no way they want to release after the annual pass expires. That would be business suicide, to let the fishes off the hook before the new expansion comes out. Especially considering how crappy DS was.
With Brewfest and Hallow's endbeing updated for lvl 90's it looks like they expect to release well before then. If they release in the beginning of September that should give around 3 weeks for the more casual players to reach 90 in time for brewfest.