I don't think the "knuckleheads" are struggling to fathom what Apple has produced, but they are struggling to fathom why fanboys think this is some utopia.
It's a bit like saying Apple have made a much better Nissan Leaf and somehow that equates to be now making the best electric car available...it's not. For an iGPU is good, currently the best iGPU, but not the best GPU. They have come up with a iGPU that is about 50% faster than the latest Intel iGPU, great but hardly earth-shattering and will not materially make a dots bit of difference when playing "arcade style" games since most AAA games don't run on ARM...and that's the material point since the article compares the M1 with older "gaming cards"