So I've tested it just to make sure, performance wise there is nothing to brag about. Neither better nor worse. Texture/shadow/lights popping in exactly as bad as previously.
I've had 2 weird pop out bugs where some cans and cards just disappeared. Found 2 exactly identical NPCs standing inside each other, playing the exact same animation with a slight delay by one. Saw homeless people run from gunshots into a fence, giving the fence some supernatural powers, swinging left and right at formula 1 speeds. Turret assist mode didn't work.
Couldn't pick up a few items after killing some Valentinos. Found 2 places near the police border checkpoint where i could noclip through solid items. Quit to desktop after 10 minutes of disappointment.
If this is what convinced Sony, we're all doomed.