Apple today announced that it will officially launch the iPhone 4S in China on January 13. “Customer response to our products in China has been off the charts,” said Tim Cook, Apple’s CEO. “With the launch in China next week, iPhone 4S will be available in over 90 countries making this our fastest iPhone rollout ever.” In addition to China, the company will also launch the handset in 21 additional countries, including Anguilla, Antigua and…