I bet you wouldn't drink a quarter pounder.
I found an old press release from The Center For Science In The Public Interest and in it they say that if you order a venti [20 oz.] Starbucks' Caffe Mocha you might as well be sipping that 500 cal burger. A venti Starbucks' Java Chip Frap is like drinking a regular McD's coffee. With 11 creamers and 29 sugars.
Mmmm, heart attack.