Mine has arrive now too (UK).
Just one thought -- did you guys checkout using exactly the same apple ID as the invitation was sent to? As far as I could tell, there was nothing special about the link in the invitation email (it was exactly the same link that a regular site visitor would use to add the 42mm blue strap watch to a basket), so I reckon the only way apple could be expediting these orders is by cross-referencing the apple ids used to make the orders against the list of apple ids that they sent out the invitation-to-purchase emails to.