I work in commercial real estate, and at a number of our centers we have Starbucks as a tenant. According to their director of real estate (which for all intents and purposes is the head of most any companies retail divisions) the closing was for an updated "best practices" training relating to improving quality and efficiencies within the store operating procedures.
Does this mean its not related to Apple? No. But as a betting man I'd wager on the side of non Apple training. As a regular Starbucks customer however, I hope I'm wrong.
