Apple's security policies seem to have become very lax because more and more photos of the two incoming iPhones are leaking and they are starting to look more and more convincing. A new batch of gold iPhone 5S photos have emerged, this time from a more complete unit. This Apple iPhone 5S has had its plastic panels on the back installed and they appear to be white - the lighting in the photo...
Source: http://www.gsmarena.com/new_gold_iphone_5s_show_white_panels_and_dualled_flash-news-6630.php