It doesn't sound liable to me, but just because the consequences would be terrible. Disastrous probably...
That date sounds like time for the new model. Skipping a model is just so big a failure for such a brand. Unacceptable...
Hoped to get my hands on a 32GB variant by that time, now it kinda hurts even more to wait
On the other hand, I wonder if the delays could be related to the issues some people are having with the Z2 (a major design / production fault maybe?).
By the way, I just noticed this week on Sony's local web site (here in Turkey) that the Z2's subscriptions were started. If there is a faulty production batch, don't worry guys, it's probably all gonna be sold here