"How are you?" is a question nobody really wants to hear the answer to so we get programmed to say "I'm fine."
I say "I'm awesome!
Heh, true - I've intentionally been answering either 'Shit, you?' or making up a little depressing story to get a reaction.
My mate Scotty questioned it, and I said the same as your quote. It's a great conversation killer when I'm not in a talking mood.