I don't think Apple meant to design iOS 7 just for the Asian market. They surely didn't sit in meetings and said 'hey, let's make iOS 7 have neon colors so Asians buy more of our stuff' 
However, because the colors have more "pop" now, and lots of new animations throughout the OS, I think iOS 7 will have more appeal in the Asian market. It's not racism, but different markets with different demographics have different tastes. With the new design, I think Apple is definitely going for the younger crowd, who were asking for years for a new design and some extra features like control center. The older demographic, and non-English speakers may have some hard time with iOS 7 because most visual elements were replaced with text, and a flat user interface that you can't relate to in real life.
The fact of the matter is that no one has a clue yet how the market will respond to iOS 7 until it gets installed on those hundreds and hundreds of millions of iOS devices around the world and see how the average user reacts to iOS 7 in terms of opinion, statistics, and ultimately sales of next gen products.
However, because the colors have more "pop" now, and lots of new animations throughout the OS, I think iOS 7 will have more appeal in the Asian market. It's not racism, but different markets with different demographics have different tastes. With the new design, I think Apple is definitely going for the younger crowd, who were asking for years for a new design and some extra features like control center. The older demographic, and non-English speakers may have some hard time with iOS 7 because most visual elements were replaced with text, and a flat user interface that you can't relate to in real life.
The fact of the matter is that no one has a clue yet how the market will respond to iOS 7 until it gets installed on those hundreds and hundreds of millions of iOS devices around the world and see how the average user reacts to iOS 7 in terms of opinion, statistics, and ultimately sales of next gen products.