[alkonaut]

I'm drinking regular espresso coffee. So I would think it probably has 1/2 to 2/3 the caffeine concerntraition of the starbucks coffee. But after my whole day of coffee and say 5-6 cups I have had less by than 12oz tall starbucks, and probably less by caffeine content than half that. But that's also spread out over a whole day, that's the key.

The peak blood caffeine concentration is a lot less when drinking 5 normal (That's european for "tiny" or "ant size") cups than than if I would have had an 8 or 12 oz coffee at once in the morning, even if it was the same coffee.

In short: I drink one decent starbucks size cup of coffee. Slowly, from 8am to 4pm.