-- Could be true:
Almost everyone I know who bought an iPhone 4s would buy an iPhone 5 next year immediately when it comes out, regardless of contract break costs. Which basically means an iPhone 5 is worth ~$550 to them..
I know i'm buying a 16GB 4s next month and if the iP5 comes out with a 4" screen (which to me is about the most logical size update for single hand usage) LTE and other goodies I'm upgrading early simple as that.
200 million sounds crazy but I could see roughly 160 million based on more worldwide partnerships and Siri in many more languages driving sales.