Most startups aren't, despite the fact that lots of the folks there are in effectively the same personal position and feeling the exact same thing - in addition to the added pressure of not feeling like they measure up to stories like this one because their quarter didn't go nearly as well. I really feel for those people, and I wish they felt more freedom to be honest and public about these kinds of feelings.
Rather tangentially - I have a one and a half year old daughter who recently turned a question we posed her ("Woah, kiddo. Are you freaking out!?") on it's head. Now sometimes when she gets wound up she goes full-meta and runs back and forth in the kitchen waving her hands in the air yelling "freaking out!", in self-parody.
That reminds me, a little bit, of our startup-culture's relationship to overwork... and don't get me wrong, I don't think articles like this are the ridiculous self-parody, I think they're the really troubling and all-too-real consequence.
Put simply I think we need to do a little more wiggling our toes in the carpet and chilling the fuck out. The world's not suffering from a shortage of first-world martyrs.
Take a breath, go home, do great work tomorrow, and for God's sake appreciate the fact that you're in the hilariously small fraction of people who get to blog about the pains of working too hard by choice.