Disclaimer: I usually go to the small indy coffeehouse but they don't have iced coffee. So on hot summer days I head across the street from work to Starbucks.
I had heard Starbucks had awful coffee from some fairly trustworthy people, but I found their iced coffee acceptable...until the other day when I was near a Peet's (30 miles from home) and stopped in and got an iced coffee.
It was 50 times better than Starbucks. It was like a whole different animal.
Tough luck for me - now I am wrecked for Starbucks and have no Peet's nearby.