Comment Re:On the plus side... (Score 5, Informative) 261
Probably because of Apple's extremely annoying policy that you cannot downgrade iOS anymore a couple of days after they release a new version. See https://en.wikipedia.org/wiki/SHSH_Blob for more details. The ability to downgrade to iOS 6.1.3/6.1.4 was disabled around 22 September.
Since iOS 7 was only released recently, there are probably still quite a few devices with iOS 6.1.3/6.1.4 in the channel, and that person probably got such a device in exchange for his iOS 7 "upgraded" one.