There are so many "events" in the timeline, first delivery, first arrival at Kinloss, first formal course of students (as opposed to training the instructors), IOC, FOC, etc...... that anyone who wanted to could probably hide some time delays by just playing with those phrases.
Personally I expect that when the first one arrives at Kinloss there will be a blaze of publicity, RAF News, local papers etc, but as to what it will actually be doing, what clearances it has etc, only a select few will know, and they probably won't be talking.
Still, I think "Frustrated" has made some very valid comments!