I got to try a Starbucks truffle today. It came in an unmarked, shiny package and was pleasant taste-wise, but no grande of a turn-on. (Contrary to what the photo suggests, however, it does not have a creamy cottonball center.)
One thing I never understood about Starbucks: why hasn't it seriously tried exploring dark chocolate? If it wants to play up its "luxury destination" cachet, it ought to know nothing goes better on a cultured tongue than a frothy cappuccino melting over 70% cacao.