I'm not sure how o delete the full version from iTunes if you download it on a Mac.
All the iTunes App downloads are found in the user's ?Music/iTunes/Mobile Applications with a .ipa extension so I would assume the iOS updates would be there as well.
I just installed iOS 7 via iTunes. I know I started the process at exactly 12 noon, but could find no files in the suggested folder with a time after noon. Thus, I wonder if the file is deleted when done, much as it is with OS X.
