Did you get the official email from Apple saying it's been shipped? My tracking details under 'Scheduled Delivery' heading shows:
Of course, it hasn't actually been picked up yet as it doesn't even show in Zhenzou China (as others posted earlier this week). But I have high hopes that now that Batch#1 has been sent out to cover the 9/21 release date, that they can process the subsequent batches in a timely manner like 'business as usual'. So let's hope 9/24 is a real date for many of us that had 9/28 estimates.