From the home screen --- settings/devices/controllers/communication method and choose USE USB CABLE.
Now when you connect your usb cable the wireless is disabled and you are full on old school wired.
(test yourself - unplug the usb cable and the controller shuts off)
Pretty sure this only works on the newer style controllers (CUH-ZCT2) series.
Some people claim it helps. Myself, I don't know if I notice much of a difference as I am already playing on a monitor rated at 9 ms input lag. Just thought I would let you guys know as I know a lot of people have latency issues and people like myself are always looking for ways to reduce input lag even if it is barely noticeable.

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