these are the dates blizz has gave for the raid unlocks for the US....
September 25: MoP launches
October 2: Mogu'shan Vaults (normal) opens
October 7: Mogu'shan Vaults (LFR) opens, those who cleared normal Vaults can access heroic mode
October 30: Heart of Fear and Terrace of Endless Spring (normal) open, with Terrace only accessible by clearing Heart
November 6: Heart of Fear and Terrace of Endless Spring (LFR) open; queuing for Terrace requires clearing Heart. Those who cleared normal Heart can access heroic Heart, same for Terrace.
so assume the EU servers will be a day after, but it means we have a week to level and gear before we can raid, so looks like there will be little need to race through the levelling.