Opinion: In regards to the best buy/Prime deal... I manage the creation of catalogs for a handful of brands owned by one big international company. From our smallest niche book, to our 2 to 4000 page beasts, they are all developed well in advance of their scheduled mailing. Right now we start books a bare minimum of 5-6 months in advance depending on the size. Point being, I'm guessing this ad was created before the Galaxy Nexus name was settled on. We usually start sending pages to print 1 to 2 months in advance, in phases. So the timing in this situation could work out for this theory.
Although, i'm all for the Nexus Prime name