I wish I had some inkling as to how a product launch and distribution of this magnitude are engineered. I'm sure it has to be more complicated than FIFO; there have to be logistical determinations made based on location of the consumer, location of distribution hubs, supply at each hub, etc. I would think a company with as many resources as Google could orchestrate a more coordinated and "fair" launch, but in that same breath it has to be minbogglingly complicated to put it into practice.
It is worth noting, however, that if I log into the Google Store and click on my order, despite it saying Shipped and giving a tracking number, with delivery scheduled for tomorrow, the Store still lists my order fulfillment date as November 23-25. Suh-wing and a miss, Google.