A lot of the article can be explained by viewing the interview as a test. The economics of false positives vs false negatives are vastly different. Giant search company can afford to not hire great candidates. More will apply tomorrow. The cost of hiring somebody they shouldn’t have is disproportionately higher.

I’m not saying this is a good thing, but to me it does explain why interviews are so hard and why they are so disconnected from actual jobs that applicants will actually perform.