yank, you got it exactly. The point is about coffee content, regardless of how much it is diluted. I can make a 1 oz shot of coffee that will have you bouncing off the walls for an entire day. No kidding – you won’t sleep that night. (That type of strength is good when you are using coffee as a base for an elaborate drink. I think that the caffeine content in a regular 6 oz cup of brewed coffee is 130 mg.)
Since I have a reputation here (undeserved) for alcohol, I will compare this to vodka. If a study comes out that 2 shots of vodka a day is good for you, does that mean 2 shots of sechs und neinziger? (for those who don’t know what that is, it is vodka at 190 or 192 proof, i.e. 95 – 96% alcohol content. Normal vodka is 40% alcohol. Hey that reminds me of a joke.)