It is annoying me how inconsistent this implementation is. It's enabled for some stock apps, but not others. Why messages and not Safari? Why on iPhone and not iPad? Why on some third party apps (eBay for example) but not most? I read that it takes the average color of the bottom 1px of the title background, which is neat, but why can't it just do it automatically for absolutely every app where the status bar is visible? I personally like it, but if it's going to be there, make it automatic and universal. Or just ditch it entirely. This sort of inconsistency in the UI should be avoided. Hope Beta 3 sorts it.