Not really accurate though. The ZSG refutes each one of the points.
Not an accurate description of a made-up plague?
At least that guide started from the point of imagining the zombie plague being something that happened to actual people. THe ZSG thing you quoted appears to have started with 'magic zombies' as its base. It refutes the first few points by saying that zombies are magically toxic...for some reason...
Have you actually read it? It makes it very clear that the zombies it describes are NOT magic.