What you have to remember is that Starbucks is in the coffee business.
Do they have an impact? Absolutely. People feel they have a 'Good Housekeeping' seal of approval, that any CD they see in a Starbucks already has the Starbucks seal of approval, and therefore they're going to like it.
They've become a power in the industry. They're a force to be reckoned with. People are looking at Starbucks and saying, 'This is a project where we'd be best served by making a deal with Starbucks even if it pisses off traditional retailers.