People for a long time have talked about the culture of people who work at Apple. Now, we have gotten more of a look into what it is like to work at the Cupertino company, including the kinds of hours that managers are expected to work in order to keep the efficient company running at full blast.
The Debug 47 podcast had on two managers who formerly worked at the company and they say that everyone is expected to work late hours, just like the CEO Tim Cook does. According to Don Melton, there are emails consistently coming in at 1am and later, which almost always come with an understanding that a rapid response is necessary.
An interesting tidbit is that there were Sunday evenings when The Sopranos was on, because Scott Forstall would take an hour off to watch the show. This was when everyone knew that they could take the time to call their family, use the bathroom, and actually have some room to breathe.
As for CEO Tim Cook, both managers describe the kind of hours that he kept. They say that he would get to work in the wee hours of the morning and then stay until late into the morning hours. He manages to run the company on 3-4 hours of sleep, much like the kind of hours that the late Steve Jobs kept.
In any case, there are plenty of people that echo these kinds of comments. Emails at three in the morning are nothing out of the ordinary and people seem to be excited to get them.