I thought the most interesting aspect of these studies is that intelligent people are better at judging the intelligence of others. Those in the bottom quartile could not estimate the intelligence of peers much better than random chance. Those near the top could estimate the intelligence of others with high accuracy.

This has profound implications in hiring selection. Having exceptionally bright founders could cause a.... founder effect resulting in the entire company being much smarter than average.

Anecdotal, but I know of quite a few wildly successful companies where the founder/CEO still participates in all interviews despite having more than a thousand employees. This seems like a random company quirk but, taking this research to practice, could actually be a large part of why these companies are successful.