They are green for good 15 minutes from first moment i see problems, not the first time, it happens actually quite often. Maybe that's the time they need to confirm/cross check/write status update, don't know.
While quicker reporting would be better, 15 minutes is anecdotally a lot better than I see from most other services where their status pages will report all-clear hours into full outages.
They probably allow regular SREs to trigger an incident on the status page on their own, when the likes of AWS and other bigger cloud providers are rumored to need approval from a VP[0] to update the status page.