Good chunks of Scandinavia would consider themselves solidly part of 'Western Europe' and with 'Mid-Atlantic US' qualifying for a category it's surprising that the United Kingdom wouldn't rate a mention, I'd wager there are far more people from there active on HN than you might suspect.
Yes, in fact western europe tops the list with ~90 points and the day just started over here. I have the feeling that the american internet userbase seems so much overrepresented on the interwebs just because it's very loud.
EDIT: ops, I misread. I thought the thread was started 22 hours ago, not two. USA still has to wake up then.
I think people tend to forget how large Europe is in total (larger than the United States), the size of the population (731 million) and how large the economy of the region is.
Well that's exactly the point I was trying to make: HN (and reddit and many others) look extremely US centric but I'd love to see access log, for I think Europeans may not be so few after all, just extremely more silent.
The similar Slashdot poll a week or so ago ('What would you prefer to be paid in? Dollars / pounds / euros / etc etc') saw a similar effect: pounds had a huge lead for most of the UK day until the US woke up and hammered the 'dollars' button :)