[redshirtrob]

Hence my question. Per site guidelines I assumed the most generous interpretation of the poster's comment, which to me means they found those sites and do not consider them official. In that light, I was curious what they would consider official.

I prefer to take a hardware vendor's opinion as to whether that hardware is supported by Linux. They have some skin in the game, and have the resources to test the hardware, whereas many Linux distros will rely on user reports.

I imagine Ubuntu and Redhat have more resources to validate hardware and so those sites are likely more reliable, but once you get to niche distros YMMV on their compatibility matrices.