So, this is interesting. Asked my dealer when their demo is due. He says he does not know, and hasn't had any information. This backs up the issue with the BWs - if the dealer itself hasn't even been told when they are getting a demo (and thus getting it later than other dealers), then this implies that the build time on their allocation for customer orders will be later than other dealers too.
I think this is the issue, in which case there is fook all I can do about it. It seems its just bad luck based on the dealer itself. And obviously this is not information that VW would want the early buyers to know, otherwise you would order from some and not others.
Annoying, but I feel at least there is some explanation and its not just random shizzle going on in the VW order system computer!