40 hours? I'm guessing that's a US thing. I'd have to be really, really desperate before I did that many hours a week.
Of course, this is presuming you hate work. I spend more than a third of my life doing it and it's something I really enjoy. A man is defined by his hard/smart work.
The typical work-day in the US starts at 8am and ends at 5pm. Throw in at least an hour or two for commute in the morning and an hour or two for commute in the evening. Possibly throw in some work-from-home after you kick off your shoes and walk through the door at home, too.
If that's all you do, then it must. What a waste of a human.
When's the last time you held a "professional/knowledge type" job? Because from my experience, 40 hours is the norm. By far. At least 90%. I work with about two dozen other developers doing both web and mobile, for internal projects as well as client work. I can only think of one person who works more than 40 hours a week and it's definitely because he chooses to. We work 8 to 5 with an hour for lunch and most people live within 15-20 minutes of the office.
Is it normal for folks in the Bay area to have a 1-2 hour commute? The longest I've ever had was 45 minutes and that only lasted 6 months until I got a new apartment (granted I own my home now so that's less of an option).
9 to 5 with an hour off for lunch is 7 hours of work, or 35 hour workweek. This is pretty common in mainland Europe. The UK standard is probably 9 to 5.30, for a 37.5 hour week.
8 hour workweek! And here's me accepting 37.5 like a sucker!