What's interesting is that a similar thing happens after two years as a private equity associate, in that almost all PE associates are booted out after two years, being told that they don't have the skillset to be promoted within the shop. At this point, I believe that many employees move onto internal corporate development, but my knowledge here is pretty incomplete about what happens after that break in the track. ("Greatness", perhaps?[0])
[0] http://www.leveragedsellout.com/2007/07/breaks-in-the-track