The acceleration of the estimates could be further explained by the slow and painful recovery from the 2008 recession in the U.S. The only three problems I foresee with the Chinese economic expansion is whether it's infrastructure is sustainable, whether it's political situation will not destabilize, and whether growing labor concerns will not move more and more of China's export manufacturing to other countries in Asia. China has a huge problem on it's hands because it expanded way too fast and often times with little oversight. As most of us in the U.S. know infrastructure cost a whole lot more to maintain than it does to build it over time. The fact that China expanded so rapidly and the low grade of their infrastructure will mean that the Chinese government will be plagued with future maintenance issues. The main reason I think that China's communist party hasn't fallen yet is because of it's flexibility to capitalism and the economic support of the U.S. Another main concern for me is that such a large part of the Chinese economy is dependent on exports, and most to the U.S. A weaker economy in the U.S. will result in a weaker export quarter for China. Whether China can switch more of it's economy to internal consumption still remains to be seen, but if it's able to successfully navigate these waters it may become the next economic world supreme superpower in terms of economy.