One 8oz cup of Starbucks coffee (the smallest size) or two shots of espresso has roughly 150mg of caffeine, according to their posted metrics. Most customers likely consume multiple times that.
Even for a blogger, this guy uses the pronoun "I" way too much and his sentence structure is too simplistic to be as well read as he claims. Ever hear of a semicolon? Also, who reads Marcus Aurelius's Meditations, Heidegger's Being & Time, and the Egyptian Book of the Dead and doesn't take any notes?