I second this. The author provided a comparison between the two system anyway. Though I think he is more likely talking about this topic from an Android user's perspective. I wrote my thoughts regarding iOS 7's UX almost 2 months ago: http://mattzlw.wordpress.com/2013/07/24/ios-7-beta-ux-thinki... Moreover, flat itself is just a name we call on graphic design. It is just one of many elements of UX design. Everything starts from a bar with a large screen on our palms.