Well, everybody has an idea, not just GAK, and they're all different and mutable.
Therein lies the problem; who do we trust, are all shops just making up random dates every now and then, how do we plan for expenditure and studio configuration, do we buy a different synth before we die of old age while waiting? In my own case I know that this is the synth I want and have already placed an order - there is nothing in the market that interest me more. I'm also a patient man used to a bit of waiting... mine arrives when it does. However, I'd like others to have a realistic estimate of the availability since I want the MB to be a runaway success, flying off the shelves, so that we stand a chance of seeing more crazy innovative beasts like it.