IPhone 5 Release Date?

Each time Apple comes out with a new phone, they update the iOS. So, most likely, iOS 5 will be released to the public on the same day as the iPhone 5. Just as iOS 4 was released with the iPhone 4. And they can ballpark the estimated time of release (Fall 2011) but there is not an official date out there. And the new iOS's are released with the new devices because the new devices are optimized to use the newer iOS versions. For instance, the software on the iPhone 4 makes it capable of running iOS 4 without difficulty, whereas iOS 4 on an iPhone 3G or 3GS would be significantly slower.