I would bet significant amounts of money that if you looked at people based on their in-job performance blinded to background you'd find insignificant contributions from education.

Not interviewing, I would bet that people from top-tier schools interview very well, as I think Triplebyte discussed the other day. I'm talking about actual bottom-line performance in the job, which in my experience shows little correlation with school or even undergrad degree for people with any experience at all.