Yeah, you're right. We probably won't see the SGSIII until at least next summer (2012). It wouldn't make business sense to see it any earlier. Galaxy S1 was a sales contender for the iPhone 4. The Galaxy S2 is now a sales contender for the iPhone 4S. We must assume the Galaxy S3 is gonna be released to contend with the iPhone 5. And we all know apple releases one per year.
Nonetheless, its still cool to discuss the leaks.