Some truth in that!
I did not have a significant FPS drop others experience due to the update (I have a PS4 PRO(!)) - so, nothing has changed for me.
But, when I think back to my very first games, I really had massive problems with said low FPS on PS4 - I felt like beeing drunken and a little bit disoriented (OK, this might be a “deep forward pass” for jokes, I see:).
So, it seems, that meanwhile my brains has adapted to this already - somehow.
The human brain sometimes really is magic, huh…