[rich_sasha]

Sort of true. But then I've worked with people who seem totally unfazed when they mess up through utter carelessness, and for reasons, won't be replaced. Or people who asked to move a button set off redesigning the template engine to be more functional, time after time.

You could say, and I wouldn't disagree, those people shouldn't be on the team. But equally it's often not that easy. Also good people are hard to find and the mediocre one might be the best you have.

It strikes me that the Google statistical results might be getting the wrong end of the stick. The teams where the leader is hands off and empowering are full of people who can be trusted which is basically the same as them doing the job themselves. The teams where the leader feels the urge to descend to micromanagement are the ones where people don't get things done.