Ms Fowler's description of her experience at Uber sounds terrible, but I don't think Uber is typical of tech companies or representative of "nerd culture".
If you read her article, it's clear that things got worse during her time there. Reading between the lines, it sounds an awful lot like the story of the missing stair.
In one sense, it's not Uber, it's just that one guy. But when people discuss what is "typical" or "representative", many miss the problem that it only takes that one guy. That guy may not be typical or representative, but if the organisation decides (whether deliberately or not) to ignore or enable that one guy, that one guy becomes the typical or representative experience for anyone that one guy targets.