Notice the following "AMD says it maintains a start-up mentality even though it's a large company". This is becoming a trend now, hardly the only company touting this. My current company is doing the same. My old company approached me recently and told me are going to start working in start-up mode in California, and this is an old and rigid company. I'm holding Paul Graham, Joel Spolsky and others accountable for th…
So find another job or another career. I'm not being mean: there are still jobs that are 40 hours per week. If those jobs don't appeal to you, switch careers and find a work-life balance that does. People get exploited because they don't act on their other options. I work 40 hours a week.
Personally I don't mind working hard. In my case the work has been interesting enough and I'm viewing the long hours as an investment to acquire certain technology experience. At the same time I do feel an increasing urge to go and start working for real start-ups again.