Yup. I hope so
It's also the buttons replaced with just text, as in Messages and Mail. In iOS 6, the buttons in apps are much more distinguishable. Example, Mail.
In the iOS 7 design language, buttons are identified by the app's color accent. For example in mail they are blue, in calendar they are red.
I'm not arguing that it's better than iOS 6 beveled button outlines, but I think the reasoning is that spotting colors is one of the most basic function of the human brain visual cortex.
And while this is not necessarily obvious at first, it's possible that it can become an instinctive discovery process (because it taps into a basic function of the brain) even with non-techies which may not even realize that tappable text is colored, but will instinctively navigate their way around without thinking about it. That would be the theory at least.