They have actually, I think at least a couple of times with the 3GS and then the 4, when they said they "doubled the memory". But not sure if they said exactly

They have actually, I think at least a couple of times with the 3GS and then the 4, when they said they "doubled the memory". But not sure if they said exactly how much that was, but everyone knew how much they had before anyway, so it was easy to guess.