Even in professions like law and investment banking, where employees do have to work grueling hours on a regular basis, the "80 hour work week" is largely a myth. I think medical residents are one of the few groups that really puts in these types of hours consistently.
so I was probably exaggerating a bit, but I stand by my original comment that many of these overworked, underpaid startup employees lead absolutely miserable lives and work harder than 95% of people on the planet.
For reference, the US in general works more hours per week than any other industrial nation. Hunter gatherers worked only 15 hours/week. Most impoverished nations work very few hours per week. The only people who beat them out are sweat shops in Southeast asia