I wonder: where did this pictures come from? It looks to me like someone cleverly designed them to accentuate the (possible) beauty and novelty of the new design.
Just look at the first five pictures at the blog post:
1) The left part shows just apple logo. The right one shows a man smiling.
2) The left part contains no pictures at all - just some text, and the right part contain a picture of a nice girl.
3) Both sides of the picture contain a girl smiling. But the girl on the right is definitely looks more open and bright. Heck, even the teeth on the right photo seems more white.
4 & 5) The fifth picture(ios7 collage) contains more smiling people than the fourth picture(ios6 collage).
I think the iOS 6 screenshots are just quickly taken from the author's real phone, while the iOS 7 shots are from Apple's iOS 7 marketing. So it's unsurprising, but not intentional, that the iOS 7 screenshots look more carefully designed to please than the iOS 6 ones.
Just look at the first five pictures at the blog post:
1) The left part shows just apple logo. The right one shows a man smiling.
2) The left part contains no pictures at all - just some text, and the right part contain a picture of a nice girl.
3) Both sides of the picture contain a girl smiling. But the girl on the right is definitely looks more open and bright. Heck, even the teeth on the right photo seems more white.
4 & 5) The fifth picture(ios7 collage) contains more smiling people than the fourth picture(ios6 collage).
I am pretty sure there is no coincidence.