Keep in mind there has been a lot of movement on the Airways side lately with a lot of people upgrading and moving to different aircraft types. Add that to the new hire training and a backlog is quickly created. I have seen pilots awarded a new aircraft type and then finally get a class date over a month after the permanent bids (base bid) effective month, and those are awarded around 2 months prior, so that's waiting over 3 months... And of course with the 787 coming very soon (and the 350 not too far off) this will further increase the training on other aircraft types. As pilots that leave their current aircraft to fly the 787, they must be replaced on the aircraft they leave...