NY Times: Benefits of Coffee?

New York Times article about potential health benefits of drinking coffee:

Researchers have found strong evidence that coffee reduces the risk of several serious ailments, including diabetes, heart diesease and cirrhosis of the liver.

It's not that I feel vindicated, exactly. Just... less guilty.

Kind of oddly, the benefits leveled when study subjects drank more than six cups of coffee a day. Six cups?? When would the potential health benefits be outweighed by the inability to fall asleep?

And what, exactly, constitutes a cup? And was this regular drip coffee? Was it espresso? Does one receive the same benefits from one latte that one would from 3 cups of coffee? Inquiring minds want to know.