Earlier quoted context omitted.
The text slide to unlock has a shine animation that moves from left to right.
I get that, but I think it's very difficult to make an argument that given a new user, it would be interpreted as an interaction cue rather than just visual polish. The presence of the up arrow is actively misleading, from a UX perspective. It's like having a slide toggle that you have to double tap to activate!
Unfortunately, in my experience so far, this isn't the only case of misleading and unintuitive design in iOS 7.