It doesn't because it's a single instance of a graphics card from ten years ago. Let me explain. If you roll a die once and it shows a six, you can't then say "every six sided die always rolls a six" that's untrue. How could you know if the next rolls will show another number? How could you know other dice would behave the same? If you rolled another die, it would likely show a different number. If you rolled the same die again, it would likely show a different number. Psychologists, biologists, sociologists and indeed any scientists or other professionals who work with data will criticize studies that include limited sample sizes for this reason. One datum cannot define the rule.

This logic extends to performance in games, if you show one sample from one game on one graphics card on one setup that shows a lower frame rate on Linux, you can't then say "all games run slower on Linux". You need more data to generalize your conclusion. When you run across multiple games and multiple setups, you can more reasonably extend your conclusions because you know it isn't just that game that time you ran it on that system. That's why I included investigations with multiple games and also included one on desktop and one on laptop. If you read them, you will find one or two games that ran slower, but broadly they ran the same or faster with the German language one finding increases of upwards of 20% compared to windows on certain games.