It took the S3 almost 2 months to sell 10 Million units. The iPhone 5 sold half of that (5 million) in one weekend. Keep in mind it still hasnt gone on sale in china which is the iPhones biggest market as well as other countries. Then there are those like me here in the USA that are waiting for the unlocked version to be released next month.
Wrong, the biggest market for the iPhone is in the USA and by a wide margin.