I've worked at several tech startups with sudden firing. The "norm" from my perspective tends to be a one month Performance Improvement Plan, usually just serving as a paper trail with very little hope of getting off of it, though I've seen people just suddenly walked out as well.
I appreciate Dan Lyons cutting through the bullshit on tech startups and I recognize a lot of what he's talking about from my own experience. The thing that bothers me the most is the disingenuity of it all, the "we're a family" and "we're changing the world" when it really is all standard capitalism business practice, not so different from Wall St or Walmart.
It's funny Netflix and Reed Fisher got brought up, because I at least respect Reed's honesty about the whole arrangement. The "we're a family" companies frighten me a lot more.
These companies are also masters of PR and marketing. Many of these companies that are Kafkaesque places to work for are frequently cited on #1 best place to work etc, and you seem crazy to complain when you work at one. People don't realize that the ping-pong table doesn't make up for the uncompesated 24/7 PagerDuty rotations, how little job-security you have long term, how anxiety inducing a lot of the performance-driven culture and open-office plans can be, etc. So it's refreshing to see a different take.