I have ordered this drink at SEVEN different DD's in the northeast (PA, DE, NY, MD) and not once has it been good. It's not even been made right from what I understand. I'm all for going a cheaper route and I welcome competition from starbucks but I've received Water with shots in it, iced coffee with no milk, and today's, milk with a shot. All larges mind you.
Starbucks is expensive but they do it right. Hands down. Your order by trained people (feel free to debate that, but it is extensive training) and it's usually right if at least close. I will not be purchasing this drink or anything besides chocolate milk from Dunkin Donuts from now on.