Thought you all would be interested in my friend at Starbuck's response:

"High fat, lo-carb?? I don't know but I will forward your idea to the Director in charge of the latte beverage line-up.

40% of the drinks at Starbucks are customized - you should try ordering one and see if they can make it for you in the store. It is amazing the drinks that htey will make up for folks."