A friend last week told me about a business he's working with. They do Natural Language Processing to scan thousands of articles about a specific topic/product

A friend last week told me about a business he's working with. They do Natural Language Processing to scan thousands of articles about a specific topic/product to see if they are positive, negative or neutral. They are then hoping to turn around and sell the business intelligence. I was wondering how it would compare on a cost/effectiveness basis with the Turk. Let us know what your experiment is and how you fared.