Recent testing revealed that Arch Linux, Pop!_OS, and even Nobara Linux, which is maintained by a single developer, all outstripped Windows for the performance crown on Windows-native games. The testing was run at the high-end of quality settings, and Valve's Proton was used to run Windows games on Linux.
It’s linked as the source of the article in this link. I would have preferred OP link to it directly, assuming the actual source being in German was a dealbreaker, but it’s still linked alongside the TH at the bottom of this one.
I am not sure why you’re so adamant about a quote in the article that doesn’t say this is about handhelds and getting defensive about a source that is in fact linked in the same article.
For the record, also plainly stated in both articles, the differences in performance are fairly small in all runs, exempting one or two outliers, and seemingly the Windows 1% lows were higher. Despite the Linux fans’ overreporting these results, “Proton run good” is not an unexpected result.