U.S. corporations are switching CEOs at the fastest pace in five years, Bloomberg reported. This year, through the third quarter, 43 companies in the S&P 500 Index were working under new CEOs. That is on pace to surpass the turnover of 49 CEOs in 2011, which was the biggest year since 2008. One possible reason: "CEOs who don't have a digital orientation are worried. We're in a new world," said Bob Benson, head of Connecticut-based search firm consultant RL Benson & Associates, in an interview with Bloomberg.