[pc86]

This is true in the sense that everyone has the same number of hours in the day, and someone who is 25 and single and lives in a studio apartment 3 blocks from the office will by definition be able to spend more time working than someone who lives 90 minutes from the office in the suburbs and has 4 school-aged kids.

But there are absolutely different levels of work ethic and stamina between people. And I'm not even talking about willingness which obviously varies, but some people can work for 12 hours straight and some people are just physically incapable of doing it.