Earlier quoted context omitted.
I've had a lot of encounters with YC founders, most of them negative. This anecdote well encapsulates the impression I had of a lot of them. I'd really like to meet the better of the crop, because I can't imagine PG and Jessica (she's usually the expert on character and personality in YC interviews) are intentionally picking petty people. I'm not the only person in the startup industry who's had this impression eithe…
I can imagine that for a company with a runway measured in months, immediate skills might be more important than for a well established company.
When I was at my startup, I hired a guy with no Django experience and minimal python. He made his first bug fix within 24 hours of showing up and was productive within a week.
Maybe RoR has a much steeper learning curve, or maybe the people doing the hiring just don't get it.