Even US?
Yes, I would imagine more developers in China then the US. Look at the populations sizes:
- US 320 million
- China 1380 million
The three most populate degrees in China are 1. Information Technology, 2. Electrical engineering and 3. English.
It would seem that not only are there 4x as many people in China v. the US, there are more of them studying technical subjects.
And the other thing about the app store. It pays just about slave wages. Only a very few people get lucky. Must make very little. But in China $9K per year is good money so not only are there more people with generally better technical education but there is better motivation too.