But maybe you're forgetting that days aren't 12 hours of noon.
Maybe the “average at noon, including sunny and cloudy days, across landmass is 60%”, but that's very much not the same thing as “the average on a cloudy day is 60%”…
But then again, how does that relate to your previous points:
> you know solar still works even through clouds right?
> So you could say 60% efficiency on a typical overcast day.
We were talking about the impact of clouds on a particular spot, and now you're telling me that you're counting the average across landmass because it's never cloudy everywhere in the world…
I suppose it means you retract your previous statements about solar panels working well even in the presence of clouds?
If you live in fantasyland where the “average on a cloudy day” is in fact the the value that exists in the Mojave desert, then sure…