Frame rate is limited to 90fps. On PS4 Pro it is 60fps.

There are several factors to include such as ping, the users wifi. Whether the controller is plugged into the PS4 via usb cable or not( which is a less than .01 response delay according to Sony).

It really just comes down to the player skill and their ping really. As we all know the difference between a ping of 52 and a ping of 345