Yes, that 'sg' does indeed signify that you are looking at the Singapore version of Apple's site, even if PC World mistakenly says that the US site has been updated with the "delayed" release date -- they are also linking to the incorrect URL. ComputerWorld has the correct info. Of course, Singapore is not on Pacific Time, but you can see here how the 10 am PT slot shows up around the globe. We're also getting links from folks mistakenly pointing to the Australia version of the site and saying "It's out now!!" Please, do yourself a solid and check in iTunes or in Terminal before engaging full freakout mode.
How did this spin out of control? A tweet sometime last night, from whom we do not yet know, with the Singapore link that got picked up and amplified over and over again. We did our best to squelch it, but it keeps coming back. The good news is, with any luck we'll all be on track with our watches very soon.
In the meantime, you can visit us on Twitter at our new Q&A address -- @ask_tuaw -- or, for some tunes to keep your mind off your anticipation, click through to the second half of this post for a custom TUAW's "Music To Wait For Upgrades By" playlist.