Of course they can't tell you exactly when the update will arrive. There are still many things to be done and if it doesn't go as planned things might be rescheduled.
If they tell us it will arrive this week, and they later decide it has to be after the holiday due to unforeseen bugs/whatever, that brings even more angry people to the forums.
Btw, I really don't care how many people are going to be 'caught in the middle of a TR'. It is only 2 levels (2 million exp).
Sure it can be quite some time to acquire that, but it's certainly not the end of the world.