Could be. I'm on the phone with UPS now to see if I can shake anything loose. Rep said she still shows 9/27, but then had me hold on to check into things. I'm on hold now.
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Ok she came back from hold and said that it's is part of a large consolidated order where they hold all the parcels at the import stage until every parcel in the consolidated order arrives there. She said the consolidated order in my case (at least) was over 400 parcels, but she didn't know or couldn't say how many of those had arrived aside from mine. She said that Apple shipments from China are "always this way" for product launches, but usually the entire consolidated parcels arrive together. In this case they apparently did not.
She further claimed that in her system it still shows delivery set for Friday 9/27 (despite UPS.com saying 10/5) and that she would monitor it and contact me by phone or email by 11am EST tomorrow regardless. I find the latter claim amazing, if true.
Not sure how much to believe, if any of it! But, she didn't seem to be talking out of her ass if that matters. Truly sounded like she knew what she was talking about. I'll wait and see.