Yes, Phoronix covers popular Linux game releases, other notable Linux / open-source gaming news, game benchmarks, etc. Just because another hardware review site publishes reviews one way, doesn't mean I need to do it that way.... Most of my "peers" also use Windows, should I go switch to being a Windows web-site too?
In fact, none of my commercial PTS customers at any of the major hardware vendors have even requested game testing like you mention. (Such support to easily calculate the maximum resolution/IQ settings, etc, could easily be added as a PTS module within a couple dozen lines of code to auto-determine the maximum values while staying above 60 FPS or another threshold, but any manual testing will not be accepted.)