“no plan survives contact with the enemy” (Helmuth Karl Bernhard Graf von Moltke)
I agree that this is/was certainly the plan… but if they are unable to flood the USA Basic buyers with 
units then i find it hard to believe they are storing the X number to ship across all the UK, or Australian (for example) units.
@Dan has already (elsewhere) said that the cost of sending OS is a lot more expensive than they planned so it would not make sense for them to send individual units when they could ship a container to a Country or Forwarding Port and thence on to buyers.
I think that realistically they will do as many of the USA buyers first for reasons of ease, practicality and product control