I say it is generally a sign to leave because at that point things have got so bad that there is a critical mass of people that don't think the company will suc

I say it is generally a sign to leave because at that point things have got so bad that there is a critical mass of people that don't think the company will succeed. Usually at these speeches no one actually leaves, things proceed as usual for a few months and then the thing fails and there is a huge strategy shift. It's not really motivational or inspiring when someone tells you "my way or the highway". When "my way" has been a failure thus far. Although rare, the sign of a good leader is to accept and acknowledge failure and correct the issues.