If the Linux users were vastly out of line, I'd question them. Instead they are inline with the Steam survey. Anyway, the idea that Mac users are not big games is about as controversial as the color of the sky.
Regardless, I definitely didn't mean to imply that Mac users are big gamers. Most Macs are MacBooks and most people don't buy a laptop primarily for gaming. It'd be a secondary concern. There's also a chicken and egg situation in which Mac users may not be big gamers because there's not many games for Macs (not to mention that Steam runs terribly and is buggy on M-series Macs). Any Mac users that are big gamers probably have a console and/or PC (like myself) due to this situation, so any wishlisting is done on the device I play games on, despite the desire to be able to play on the go on my MacBook. Any Mac users that aren't big gamers may be due to having limited games. My wife who isn't a big gamer, but does like to play games occasionally, is relegated to using Bootcamp on her iMac.