Semi-true; it depends how the extra 20 hours are spent for myself. I've had weeks where I program 60 hours or more and it's all spent well, and then the next week I might be a little more burnt out.. take it a little easier and then sprint again.
Sometimes you've just got to put the hours and effort in to get the work done on time.
Now I quit very quickly after doing stupid hours a week. But I'd like to think the work produced was fine. Not that much different to a normal week. The work was all planned in detail, there weren't any big surprises, just lots of code to type in, lots of tests to write and run. I was just more tired.
The one that works best for me is for the deadline to be 4 hours and 15 minutes away.
You mean they developed depression and gave up having a healthy work-life balance?
Elsewhere, I've written how it may be better to switch between periods of very long hours and downtime rather than a steady pace:
https://metarabbit.wordpress.com/2014/02/26/average-work-wee...