Very interesting. But the standard account says that Russian authorities were afraid of American attack at the time, and likely to make the wrong decision regardless of standard procedure. So the parent by itself doesn't address the relevant claim.

Also, the Wikipedia quote made it sound like Petrov might have reported sighting missiles after all (perhaps with a disclaimer). This is neither cited nor credible. If one of his superiors arguably saved the world by following protocol, high probability Putin's people would have mentioned it in their press release.