It depends, for the most part, I'd say it's at least fairly accurate. However, every once in a while, someone will go screw with it. For instance, I remember a time I found the wikipedia page for the Regenerators from Resident Evil 4, and the article in question stated that the reason they were hostile towards one Leon Scott Kennedy was because they did not ingest their daily quota of bologna sandwiches. If I'm not mistaken, there was also mention of their regenerative abilities originating from pagan rituals they had performed in order to become legendary artists. Not particularly accurate, but certainly worth the read.