Upon closer inspection, the glyphs are each rendered onto the framebuffer sequentially... one-at-a-time. IE: NOT in an embarrassingly parallel manner. So the joke is starting to fall apart as you look closely.

But those kinds of details don't matter. The post is written well enough to be a good joke but no "better" than needed. (EDIT: It was written well enough to trick me in my first review of the article. But on 2nd and 3rd inspection, I'm noticing the problems, and its all in good fun to see the post degenerate into obvious satire by the end).