I must say I don't agree. What we have here is a conflict of interests. I, and it seems most of us here, believe that the movies shouldn't be watched in chronological order. The prequels exist solely to explain everything in the OT. While it doesn't always do a good job of that, it's impossible for the prequels to spoil anything in the OT because you would have seen the OT already. Now, this is consistent with the way that George wrote and directed the prequels. He uncovers all the secrets, reveals all the spoilers, and throws in about as many nods and ripoffs of the OT as humanly possible. The conflict of interest is that George claims we're supposed to watch them in chronological order. It makes no sense to me that he would say that, since every action he took in making them suggests otherwise. If he'd really wanted us to watch them this way (which I still wouldn't), he would have made them to flow that way. But the truth of the matter is, they're just not supposed to be viewed that way. He'd have to be an idiot not to see that.

P.S. And I'm still glad they called him Vader before the suit, something that wouldn't have been possible if the not-really-that-much-of-a-surprise-to-anyone was supposed to be maintained.