One of the points brought up in Person's article, that cyberpunk marked a shift in scifi mentality away from the "change one thing and see what happens" towards a world-building model, is not born out by the history. Just looking at a few classics, from Ender's Game to Stranger in a Strange Land to even the Foundation series, writers had been creating entire universes just as complex and varied as the world of Neuromancer or Snow Crash.

What separates these earlier worlds from early cyberpunk(with it's high water mark of Neuromancer), is their generally cheery view of the world. This is not the case to the same extent with Ender's Game, but the case very well could be made that, at least under Person's definitions, Ender's Game is a sort of proto-cyberpunk.

One of the main distinctions Person makes between cyberpunk and postcyberpunk is the corresponding world-views of the two subgenres. Postcyberpunk, just like the post-Cold War era into which it is written, has a rosier view of humanity, and of humanity's eventual perfectability(even if that eventual perfectability doesn't look precisely human(this is scifi, after all)), contrasting to the late Cold War mentality that the world is on it's way down; while technology gets increasingly spiffy, it's not making the world a better place.

Postcyberpunk is a return to an earlier, and much larger theme in science fiction: the future is going to be better than the past. Earlier Cyberpunk is the anomaly.