We first saw the images on French site Nowhereelse.fr. It looks like they originate from WeiPhone.
One thought on these images: Apple's new software, iOS 7 uses a bright new color palate. It would make a lot of sense visually if these bright, new-color iPhones matched the bright new colors of iOS 7.
That said, take this with a grain of salt for now. We don't know much about the origins of the images.
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