Wow. I don't know which Google you worked for.
Also speaking from experience, I work between 40 and 50 hours a week. I occasionally respond to an email in the evening, if I notice it and it's easily addressed. Otherwise I leave it until morning. Performance reviews are peer driven, and I've never even *heard* of anyone getting negative marks for taking vacation, let alone having it happen to me. I'm respected and trusted by my largely highly competent peers, and nobody expects me to kill myself working. Sure, sometimes there are emergencies and crunch times, and there are crappy parts of every job, but this is a *very* good place to work.