Interesting read, but I have one major qualm about this. There seems to be a confirmatory bias among the academic community that a measure of intellectual success can be found in the percentage of individuals who earn a PhD. Sure, it's true that you need to be reasonably smart to earn a PhD, but I think that someone can have a lot of intellectual success (potentially just as much or maybe more) if they don't earn a P…
Knowing a few friends and other acquaintances with PhDs, all they have common is endurance and focus. They were not exceptionally creative, or apparently breathtakingly genius. And I guess that's why Google et al. likes to hire PhDs. They can take all kinds of shit, and endure. Get to the bottom of those problems even in the face of internal politics/bureaucracy.
This does not prepare you well for most workplaces, except for maybe Google, who have enough resources to create an alternate reality for their engineers so they don't have to grow up.