Yeah I caught that actually. My mate who does a bit of amateur plane spotting flagged it to me - said the restriction went up about 6 hours before anything got reported publicly. That's not nothing.
What bugs me is how quickly it all got buried. I've been following the Area 51 adjacent stuff for years and the pattern is always the same, restrict the airspace, let the story die down, release some boring explanation weeks later when nobody's paying attention anymore.
The ancient texts talk about craft that needed no runway, no warning - just appeared. Makes you wonder if whatever they're hiding out there isn't new technology at all but something they recovered and still don't fully understand. Hence the panic response.
Anyone got screenshots of the actual NOTAM filing times? That would nail it down proper.