Did you read the story ?
She asked for artificial sweetener and they put real sugar in it. She then went into a diabetic coma. She is not suing for it being "too sweet" - she is suing for personal injury.
Personal I think that if you are that bad of a diabetic you should not be trusting your life to the highschooler working the early shift at Dunkin Donuts....Order it black and have your own sweetener in the car with you or something.
It would actually be an interesting case though. Does the servers duty of care include vigilance in preparing orders?....
Someone schooled in law care to chime in? Will anything become of this?