"Mayer insists on personally reviewing every new recruit, a practice that supporters say brings needed discipline to the company."

For a company the size of Yahoo (or any company that's bigger than a small business), having the CEO review every hire is the worst kind of micromanagement and sends the message to her managers that she doesn't trust them to do what they're paid to do. It also means that Mayer is spending less time doing the things that really are her job as CEO.