The amount of moaning that the status page wasn't updated in 0 seconds and had the wrong status for entire minutes is what leads me to believe that no, users do expect 100a% fidelity.
Total outages are rare enough, and there's enough other work, that spending time building a system for that, just doesn't seem like the best use of their time. though I'm biased, having faced that exact question from the inside, at different company.
I don't think anybody asked for 100% fidelity. We are talking about a complete outage that affected at least North America and Europe. If the status page shows green in such a case, its fidelity is around 50%. People expect better from GitHub.