There's an interesting comment from an MBA in the initial link, explaining how 3 years ago he was offered a position from Google and he turned it down.

The first 3 reasons he lists:

1. Chaotic operating environment -- too many experiments without expectations to justify or measurements to validate them...

2. ...which was technically impossible because everyone rolled up into one massive P&L

3. Too many battlefield-promoted 'directors' who hadn't actually managed before... none of whom i'd think of as viable mentors

...Actually seem to be Google's strong points. http://steve-yegge.blogspot.com/2006/09/good-agile-bad-agile_27.html