I think the actual answer you are looking for is this paragraph:
> These old workarounds got subtle edge cases wrong in ways that produced occasional hitches, deadlocks, or weird behavior in specific games, which are bugs that don't show up on benchmark charts but can absolutely ruin individual experiences. NTSYNC fixes those at the source by matching Windows behavior exactly, and that means as soon as your favorite distro moves to the new kernel version, whether it be Bazzite, CachyOS, Fedora, or a flavor of Ubuntu, they all get this much-needed fix.
That's the crux of the article. NTSYNC isn't faster, it's more "correct". Most games are around the same level of performance, with certain outliers both ways. Right now there isn't anything performance wise that Linux has to do that would impact all games. Just tweaks and additions to the different layers [1][2][3] in the same way driver vendors do. Much of the poor performance is for API violations and other shenanigans.
1: https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/src/uti...
2: https://github.com/doitsujin/dxvk/blob/master/src/util/confi...
3: https://github.com/HansKristian-Work/vkd3d-proton/blob/maste...
> NTSYNC isn't faster, it's more "correct".
It depends on what you're using now, though. If you're just using a vanilla wine/proton install, then NTSYNC should indeed be a lot faster as well. If you're using fsync or... I forget the name of the other one... then you many not see much in the way of perf improvements.
Esync was the other one. Basically either of those enabled (honestly probably both were) and it didn't hit a corner case with issues, NTSYNC is basically no benefit. (I personally would rather use NTSYNC)