AppleCare is supposed to get ready to to receive exceptional amount of iOS related issues on Monday October 10.
Earlier today we already carried a rumor about the iOS 5 release date. This rumor said that the iOS 5 Golden Master will be ready on September 23. Now AppleInsider reports that persons familiar with the matter told them that Apple is preparing customer support for increased iOS-related calls starting Monday October 10.
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AppleCare call centers are supposed to expect eightfold increase in customer calls on October 10. It is very possible that Apple is releasing iOS 5 to existing iPhone owners before the sales start of iPhone 5. To take a couple days as buffer between these two events makes live a bit easier for Apple, their servers and AppleCar employees.
Right now we expect Apple to ship the iPhone 5 on either October 13 or October 14. See also this iPhone 5 Release Date guessing report from earlier today.
More iPhone 5 Rumors.