To those complaining about this comment.. Considering these finer details is the role of a designer, without such considerations, you wouldn't have half the products you use every day. So quit your bitching, and go complain about someone else's conversation.
Personally, I really dislike them.. Simply because they are a bad design choice and go against everything that Ive sold us in his video about ios 7. They take up more room than is needed.. They highlight what you don't have rather than just what you do, they distract from your content (which is supposed to rise above) and they are quite a bold design statement on every screen you'll see in ios.
If you don't care about them, great, lucky you, but this is a conversation for design enthusiasts whether they love them or hate them.