Companies headed by introverts performed better in a study of thousands of CEOs

http://qz.com/748741/companies-headed-by-introverts-performed-better-in-a-study-of-thousands-of-ceos/
The type of CEO who lands on the cover of business magazines has a big, outgoing personality, all the better to charm investors, win over partners and rally employees.
But what if companies run by extroverts did poorly? What if companies fared better in the hands of introverts?