GN came to a weaker conclusion when they were looking at one of the handhelds (I want to say the asus ROG?), although they just attributed that to the device rather than claim it was the OS.

But most of this reminds me of how Elden Ring was significantly more performant "on steam deck" at launch. And that was mostly because all shaders had to be precached which had implications on how From were streaming content. Which is likely why stuff like mortal kombat 1 apparently forces players to wait for shaders before they can play.