My experience is the same. The 80 hour a week salary (no overtime) culture is also prone to people just goofing off. So sure you are in the office 80 hours but

My experience is the same. The 80 hour a week salary (no overtime) culture is also prone to people just goofing off. So sure you are in the office 80 hours but only 30 of those are productive hours (at most). If you know you're expected to work 80 hours you will be on the clock 80 hours but not all of it will be "work." I found that with shorter work days people stay more focussed and make better use of their time because they know they need to.