This only matters if the different skill distributions would make it likely that a lesser-skilled candidate does not meet the standards needed to produce good c

This only matters if the different skill distributions would make it likely that a lesser-skilled candidate does not meet the standards needed to produce good code at that level. In my experience this is not the case. When you are hiring for one of the big-5, the candidates that make it through the first-pass screening by the recruiters are usually people who any other company would hire on the spot. When you get down to making a decision among the top few from any crop of candidates it really is a coin flip. Every engineer at Facebook likes to think that they are there because they are 'the best of the best', but having sat through far more hiring reviews at Facebook than I ever thought I would have to put up, with the simple fact is that for every person you see walking around the campus there were two or three other people who the job offer could have just as easily gone to were it not for a whole host of non-code/non-dev reasons; these reasons can range from gender to the sloppy handwriting on the whiteboard to the fact that when I came in to do your manager interview I happened to be a little annoyed that the cafe had run out of lox for my morning bagel. In my experience, the least qualified female engineers I encountered were more qualified than the lower quartile of male engineers and they worked a hell of a lot harder to boot.