Gentlemen,
Could the answer to the unexplained CI400 be that it is designed to get people back to Dubai quicker to allow them to go onto their next duty that much sooner and not make the following day a day off or rest? There could be a lot of smoke and mirrors around the few flights that this is actually meant to be targeting which will change the roster times and make people work the following day?
Beware rushing, this increase in fuel burn and a throw away of the departure from a destination for gate occupation in DXB is a shambles. Something is going on and the reason that you are not being told is because the result is not good news for you.
900 hrs will always be 900 hrs no matter how fast you go, fly safe.
J