We have people here, come in around 9:30am, then leave around 7:30pm. He did this but finishied some 200 shots in a very short amont of time (but he worked on Sunday also). It really gets down to one's habit sometimes, if you manage your time right, it's not necessarily to work dreadful time zone.
Some people like to come in late, like 11:30am, then of course you leave late. It's a vicious cycle.
(I used to be an animator.)