well, they say it is. Personally, I find it undrinkable black, which is the true test of a good coffee in that it is delicious black; if it needs cream or sugar or weird flavorings added, it's bad coffee. Practically no one drinks starbucks coffee without heavily doctoring it, so I suspect most people don't like the way it tastes.
I never quite get comments like this (or about spending $5+ on drinks there) and always kind of figure that the person's never actually BEEN in a Starbucks, because all I ever get there is a tall dark roast (love it when they're brewing the Yukon blend) with room for cream, unless it's hot out and I want iced, or if I'm getting "dessert" (a mocha). Starbucks always has coffee-coffee.