I've actually been reasonably happy with the 401K performance, so left it at Xerox (so far). I did roll my pension into an IRA with an investment firm, but wasn't ready to commit all my eggs to one managed basket (advisor). My 401K is diversified across several funds. I just basically don't want to pay the 1%+ fee most financial advisors charge - and, being a financial advisor must be a pretty decent income, considering how many of them there are in the business.
Not sure how much influence / control the C suite has over the 401K.