Haven't tested any games yet but general app opening seems faster after the update and the font of the always on display changed, the numbers showing the time are bolder now.
I got mine on my mate rs. I hope more games support it soon.
GPU Turbo changes the way graphics are processed at kernel level and supports all apps, some articles were incorrectly reporting only a few games are supported as of now or it needs developer support, it doesn't.
Lol ... I don't play many games (been trying to play Fortnite, but still stuck on waiting list for over 2 weeks 😥) ... So cannot really tell if any improvement, but this phone has always felt quick anyway