No it might not. As I just checked, that is not an actual real usage statistic, it is a survey with answers given by participiants. Should you exclusivly use that steam deck, you might not even be aware that it is Linux ;-)
If you have a Windows Gaming Machine and buy yourself a Steam Deck, what would you answer...
That is not right. You don't answer anything, the only question is if you want to participate, if you answer yes, the steam client automatically captures all that information.
If you have a PC with windows and a steamdeck and you participate in the survey on both, the system will add a computer with windows and a computer with linux.
More than once, steam has asked me if I want to participate, and you shouldn't answer anything manually, precisely, because then the data would depend on your knowledge of your hardware.
EDIT: Maybe you are confusing some other type of survey, please, search on how the official steam hardware survey works and you will see that what you say is not correct.
