Yup. Which is why these threads should pretty much reflect increase of ereaders in the general public as well:
https://www.mobileread.com/forums/sho...d.php?t=139624
https://www.mobileread.com/forums/sho...d.php?t=139006
But for sure, it seems there may be certain patterns in demographics and geographic locations which have an impact on overall ereader "popularity".