This article is written by someone who hasn't thought very deeply about the mechanics of simulation, particularly the analogy it draws between the speed of light and processing power which it later completely invalidates when discussing quantum entanglement by stating position (and thus velocity) to be irrelevant.

The test itself is fallacious. Annihilation, in particular, would not destroy the information in a particle-pair. That information would be retained in the states of the resulting photons, just as it's retained in the event horizon of a black hole.