Likely not, but this portrayal in the article isn't close either. It only applies to 'hot startup' folks, which are a subset of startups, which are a tiny subset of employees here.
well it's representative of my experience, so that is why I shared it ;) The hidden node here is that I took my first programming job in 1996 when I was 16 and I've been continuously programming since (also, I first learned on an atari 800 basic cartridge). I'm also 35, fit, disciplined and high energy. So for these factors, it's probably representative.