[repolfx]

You mean, beyond the companies being successful and effective, and famous for the skill of their workforce? Beyond 9 of the top 10 most valuable companies in America being tech firms that all interview in similar ways?

What kind of evidence that tech interviews work well are you looking for, exactly? Isn't the obvious evidence of your own eyes sufficient?

[ergothus]

Not the above poster, but if they only hire 10% of their interviewees, that's a sign that not every interview is a "close call', which is the context of an interview being high signal here.