Dumb Little Man is a blog that I frequent, and his article post Why Top Employees Quit is very popular on his site, and for good reason. They analyzed the reasons their top performers left by taking historical data from exit interviews and comparing it to annual reviews. The real gem of the article is the comments section, where people have felt anonymous enough to share personal stories about companies they have quit from or employees they have had quit their companies.
It's good for a business to pay attention to exit interviews and anonymous surveys, as they provide helpful benchmarks for worker satisfaction, but as many commenters pointed out, there is plenty of reason to not be completely honest about your satisfaction levels or reasons for leaving.
