The reason for the delay, typically, is that games are released on Tuesday in the US (I have no idea why) and Friday in Europe. Since 11-11-11 is a Friday, everyone gets it the same day.
I think the reason they're released on Tuesdays is because I believe sales figures come in on Mondays or something like that. At least that's what I remember hearing about it. Whether or not you believe that is up to you. Personally I don't care as here in the U.S. we get our game releases on Tuesday and then Fridays are for movie theater releases. We're entertained throughout the week.

Yeah I really don't care what day of the week something comes out, but Friday for a game like Skyrim seems to be a better time to be released, you get the weekend to play it, where some people don't get a chance to play new releases until the weekend anyways.