There is of course a lot of US-centrism and exceptionalism out there, but GP could just more benignly be noting that Valve is an American company, so it really would be strange for them to not launch in the US as part of the first cohort.
I'm in the U.S. and am getting the Available on Nov 16 button, but worth noting this note at the bottom of the Deck homepage:
> Steam Deck Limited Edition is an experiment for our team, and we were only able to make a small quantity. That said, we hope this is a successful experiment and customers are excited – if we see there is a large demand for this kind of product, we will definitely continue to explore more colorways in the future.
I'm getting that same message, but am in Australia.
From memory it's actually not available here, due to our government level consumer protection people not putting up with Valve's bullshit a few years ago.
I'm in the US, so that seems kinda strange.