I think this has to be an individual thing- I drink 2-3 full size French press pots of dark roast every day (lots of the go juice in there!) with heavy cream and flavored stevia and my sugar usually drops after a cup. Coffee has antioxidants and fiber as well.
In those recent tests, the subjects were given pure caffeine tablets, not coffee- so I immediately discounted the results.
I just want to live happily ever after-every now and then. Jimmy Buffett