This is not universally accepted. It is an instagram conspiracy theory.
We have several very recent threads on this already where the debate is quite strong, I would suggest you look through there.
www.elitefourum.com/t/psa-must-do-better/25902/1
www.elitefourum.com/t/recent-psa-submission-grades-and-comments-from-psa/25459/1