I've never tested 23 exact, I've tested 20/25/30/35/40/45 even 100/90/80/70/60
This is why GK is still an experiment. My issue with the 20's was that they were still saving hard blasting shots with ease and catching them. Despite having shot speed at 52/53/54/55.
It's a strange one this year, but as always, we'll figure it out.