doubt it
Whys that? The 3GS supports ios5 and is over 3 years old. The original iPad is less than 2 years old. I say it will be handle to ios6 but probably not ios7 or whatever they'll call it.
I bet the original iPad will be able to run ios6.
Any guesses what iOS 6 will bring? 5 was a major upgrade over 4, but hopefully 6 won't just be a small bump.
I want OSX features in iOS like how Mountain Lion is bring iOS features to OSX.