At Microsoft its pretty good, I can't speak well for others. Work-life flexibility is something we take pretty seriously in the groups I've worked in, and the workload is pretty manageable. It's a little >40h/week on average, but not dramatically so, and most people take their full vacation and holiday packages (3-5 weeks vacation, 12 holidays). There are bad weeks or a bad month, but its not the norm. I'd say almost everyone spends more time then that doing other technical things, but that's because we get joy out of it. Last time I tried to measure it, I'm typically doing about 5-10h/week on top of work reading technical books, researching something, or playing with some new technology on my own time.

There are also a number of true workaholics spending 60 hours + a week strictly working, but that's typically because they want to and not because the organization is running in permanent crunch mode.