This is the original post of the iPhone girl from a 3G iPhone user in the UK.
This is his post from the Macrumours forum:
Not sure if this is or is not the 'norm' but I just received my brand new iPhone here in the UK and once it had been activated on iTunes I found that the home screen (the screen you can personalise with a photo) already had a photo set against it !!!!
It would appear that someone on the production line was having a bit of fun - has anyone else found this ?"
Thanks Macumors: link