Apple has just released iOS 7 to the public. However, as noted by Apple’s update XML — which is where the OTA service in iOS gets its data — iPhone 5c and 5s users will be prompted to update to 7.0.1 when users unwrap their new devices this Friday.
Pogue and Mossberg both noted in their iPhone reviews that an update for iOS was hitting this Friday, in time for the launch of the new device. Apparently, 7.0.1 exists primarily to fix a bug with the Touch ID system and iTunes purchases.
The build numbers between the Gold Master and 7.0.1 are very close, leading Steve Stroughton Smith to believe that 7.0.1 may actually ship with the 5s and 5c, although this does not corroborate with Pogue and Mossberg’s comments.