Re:Nootropics – The Facts About “Smart Drugs”
by ConceptJunkie on Thursday September 13, 2012 @01:05PM
(#4517293)
Seeing as how the article considers (and rightly so) caffeine as a nootropic, I'd say the numbers are probably more like 70% rather than 7%.
http://singularityhub.com/2009/10/06/should-students-be-test...
What would you bet that ivys have a higher rate than average too? :)