I spent 9 years there, left a decade ago. Turnover is high, but this is a gross exaggeration. It is stressful, and not everyone can hack it. I was there during and after the '05 layoff when roughly 2/3s of IT was cut. That's still the worst I've heard of from what I hear from friends that are still there.
Ken G definitely does the "Good to Great" getting the right people on the bus thing, which typically means the bottom 5-10% are cut, but even that was slowing before I left.
