It was not updated immediately. I was seeing 503s for a solid 15 minutes while the status page was all green. This is also their second outage today:

https://status.gitlab.com/pages/history/5b36dc6502d06804c083...

As others mentioned, it wasn't that quick.

It's also not accurate. After nearly a half hour the page shows "git operations" as green but I'm not able to push/pull from my repos with SSH or HTTPS (and haven't been able to the whole time).

It took at least 5 minutes, closer to 10. I think the outage is so bad, it got pushed fast.