My money is on a delay of retiring current QF aircraft. The long term plan of having the 330's as domestic aircraft, relies on the new terminal at Sydney. There is no point re engineering the current Qantas terminal, they will be out in a handful of years. And as the current QF terminal can only handle 2 x 330's, they wouldnt want to send too many more 330's to the domestic operation just yet.
Thursday will be a non event.