I did read your post. And I'm saying with complete certainty that a X.1 update would NEVER spend a total of 4 months in beta (first seeded 6.1 beta was november 1). iOS 7 WOULD however spend that much time in beta. Also why would Apple take away from one of their stars of the show for WWDC by show iOS 7 just 5 months after the release of iOS 6? The logic just doesn't hold up plain and simple.
Kind of like how Apple would never release an updated 4th generation iPad only 7 months after the 3rd generation?
Or that OS X Mountain Lion wouldn't be announced via the media without a keynote only 7 months after Lion was released?
While I agree that the past can be a good indicator of how they might operate this time around, it in no way is a guarantee. It is clear that there is significant pressure for Apple to release a mobile OS that moves ahead in meaningful ways as competitors catch up and surpass them in this area.
When backed into to a corner, it isn't surprising to see entities operate outside of "normal".
We'll see.