My starting point is this study by biz school professors (unfortunately paywalled) about how power law distributions define employees in sales, scientific research, entertainment, and really much of skilled labor: http://onlinelibrary.wiley.com/doi/10.1111/peps.12054/abstra...
In effect, it's common for 20% of employees to be responsible for 80% of a company's productivity.
I'm a writer at Priceonomics, so you can read the blog post I wrote about the research and the topic here: http://priceonomics.com/whats-so-special-about-star-engineer.... I'd love to hear what HN thinks in the context of this thread.
It's a longread. I think the most important points are:
1) You find star performers in many industries
2) Star performers are not inherently more productive - context is important. They are talented but also benefit from the system supporting them. In one study, the performance of 10x Wall Street analysts crumbled when they switched employers if their team did not come with them.
3) If you get obsessed with 10x employees and A players - and lose sight of important points like the importance of team - you will become Enron. Really. Enron lived and breathed the A players motto until their idolizing of "talent" lost all connection to reality. You can find a link to a great Malcolm Gladwell article on the topic in my post.