Today is most likely... Could very well be tomorrow. Or Thursday. Best not to expect it at a specific time or day. It'll get here when it gets here. Making new threads also won't get it here faster.
The update is available in the iOS store, BUT... There is no content update. You can download the core but nothing changes except the splash screen. It has been reported that this is actually an error on the part of iTunes, they weren't supposed to release it until later.
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1-2pm USA time...
it always catch me when im back home from work...
Nothing yet for us Android users.