> I haven't seen any study linking interview outcomes with on the job performance e.g. yearly performance rating or promotions. In fact many people have requested this data over the years.

But that is exactly what Google did, they linked the interview results to later performance evaluations and that is the correlation I'm talking about. The better they scored on the interviews the better the performance reviews they got later. The correlation was very stable and didn't just appear at low levels.

Your company might not have done such a study, but Google did.

> Also the landscape has change, and what might have worked 5 or 10 years might not anymore. Tech interviewing has "professionalized" in a Goodhart's Law-esque fashion. People have become very dedicated to game the process, which might affect the quality of the outcomes. But just to be clear again, I want to see evidence one way or another.

That is true, the data I saw is nearing a decade old now, but at least the data back then showed that it worked.