I have a pretty nice espresso maker and I guarantee it packs more caffeine into a demitasse cup than I can get in a very large cup of regular coffee.
But Turkish coffee has more than either, by far.
OK, let's have a post-athon continuously while drinking espresso.......We'll bore the pants off the forum, but let's see who can stay up the longest? No ritalin or Adderall either! That's cheating.
I can drink four shots of espresso and go right to bed and be asleep in three minutes. But maybe I'm dain bramaged?
Seriously though, my wife(who's a genius chemist person in industry for twenty years) proved it to me. We even used a mass spectrometer and gas chromatograph for analysis.
Espresso just tastes like it's super coffee.