yeah, except that the hacker diet /kinda/ sucks. It's the sort of solution someone comes up with by assuming no existing solution is worth anything, and striking out on their own. There's some insights, but mostly it's stunningly naive and banal.
The real secret is to eat fresh, whole, minimally processed food. It doesn't matter if it's organic, free-range, hormone-free, genetically engineered, or anything else, as long as the first three hold.
The article discussing modafinil were a little over-enthusiastic, I think. It's more suited for people who have to say alert and watchful for long periods of time, rather than people who need to make better decisions. It would help night watchmen or troops on combat missions more than it would help a scientist or software developer.