Because there are eleven apps/links/whatever. I never quite understood why looprumors thinks there's "one secret missing app" on the iPhone. If anything, there are _five_ icons missing. It's really simple, isn't it. You have a grid of four icons per row, and by having 11 icons, you fill three rows with one icon "missing". If they had 13 icons, you'd have three full rows plus one on the left of the fourth row.
The fact that the "clone" has exactly 11 icons as well probably is intended. They wanted the picture to resemble the iPhone as closely as possible without having to talk to Apple about patents. It just _looks_ similar.