I used the Canadian mirror to find/get updates - maybe the Canadian segment was updated before the USA?
[I can't post the link because I need 5 posts first.]
There is no mention of the date of the release on the Canadian website, other than the version number which was 184.108.40.206 - I was on 220.127.116.11, so it was newer to me. The date of the actual file was November 21 when I posted and downloaded the file on November 30, but that doesn't mean it was released then - just probably created on that web server then.
The file posted on the USA site is dated November 28, and it's the same file version, 18.104.22.168.
Anyway, I did install it on my set, and to be honest, I don't notice any difference. Maybe if I had HDTV I would, but SD looks the same -- maybe my eyes aren't quite discerning enough. Also, I'm not currently using HDMI with any device, so I can't comment on improved PQ using that connection. Also, I haven't been into the service menu, so I can't comment on "improved info in service menu".
So far, I'm still very happy with this purchase and look forward to getting HDTV and HDMI devices to connect to really test it out.