Nope, you guys got this one wrong. This is a "Tall" in Starbuck-speak. "Venti is their largest size, which the rest of us earthlings call "Large."

You got the "tall" and "venti" mixed up, on the "tall", you put a venti, on venti, tall...

Did they change the size on their cups? On the plastic ones not the paper. (cold drinks)