The author raised the point that very often young founders only want to hire someone in their own image. I believe it's more of a problem of those young founders have never worked with anyone who are NOT of similar backgrounds than they are. In some cases just spending a couple years at a bigger company with a more diverse workforce would completely shatter the "most productive engineers are 20 something CS grads who can code 80 hours a week on Red Bull" stereotype. Sure those people may be motivated by different things in life at that point, but one quality of being a good leader is the ability to gather different people with different backgrounds and motivations and still utilize them to the max and achieve the common goal. A company that's run purely on Kool-aid may have the short-term "enthusiasm" but is not going to survive the ups and downs of a long journey.
Efficiency is not lines of code produced, it's the experience to choose the right technologies and approach the first time: when to choose a stable, behind-the-curve technology and when to take a calculated risk; when to do something that's good enough and when to do spend more time to make it robust.
