Yes, GP's closing paragraphs were absolutely baffling to me:

>To sum up, I am willing to do a mental test (memory, or IQ, as the smart drug promoter chooses) duel with anyone who claims that smart drugs have helped him become smarter.

Wait, what? He spent 1000 words explaining to us all of the ways in which research around nootropics is lacking and then closes by proposing a ridiculous test fraught with a glaringly obvious confounding factor (the test subject's baseline intelligences). Baffling.