I think I'm more or less in agreement with Rhikter and Rayne. Without altering Ben's dialogue in Ep IV, it's going to be very difficult to do Ep III in such a way that both the hut scene makes sense to a first-time viewer and you save the reveal in Ep V. Personally, I don't mind that being shown in Ep III. I still see the two reveals in Ep V as major plot points, and the Yoda one is still a surprise — you think "Obi-Wan's sent him to Yoda, which makes sense, but he obviously didn't know that Yoda had gone batshit insane during his years of exile", which makes the revelation that he is [still] Yoda still a revelation of sorts. As for Vader's immortal line, I see it no longer as a "holy SHIT" moment but an "oh, you Utter Bastard" moment. Some of Alec Guinness' reactions in Ep IV, although (despite what Lucas may claim) they were not intended this way, work very well if we know that he's keeping Luke's true legacy a secret (most obviously the small pause before "a young Jedi named Darth Vader..." and the wary nod after "I want to become a Jedi like my father").
I thought InfoDroid and TJ Davis' Reborn project was the best way to tell the whole story and keeping the surprises. I think if you're going to have it in chronological order you have to sacrifice something.
My other point is: What would *we*, as fans, have thought if Lucas had gone and made the prequels and NEVER shown Darth Vader even in Episode III, as Ady's planning to do? Most of us were looking forward to seeing him stop angsting, get on with it, and kick some major Jedi butt. He becomes evil with half a movie to go and becomes the Darth Vader we remember with barely ten minutes to go. And some of us whined almost as much as Anakin. I think if Lucas had tried to pull that we'd have declared it the worst film of the series.
All that said, however, if anyone can pull it off, it's Adywan.
Monroville posted while I was writing this, and I have a couple responses to him: Tatooine was the perfect hiding place for Luke, because it was where Anakin Skywalker grew up. It would remind Vader of everything Anakin had once been, and so he would never return there. I forget where I read that explanation at first, but it makes enough sense for me. In addition, I don't think Anakin will build C-3PO in Adywan's version, and there are squillions of 'droids built of the same parts as both him and R2-D2. His introduction of R2 as his "counterpart" indicates it's not uncommon for 3PO-types and R2-types to be paired together.
In addition, Luke is not very attuned to the Force until he's trained with Yoda. Vader may be able to pick up something, but the Force might not be able to tell him anything about the nature of the individual, much less his genetics. We've never once seen in any of the films that the Force can tell anyone anything about someone's genealogy. Vader only knows Luke is his son when he discovers his name is Skywalker. I expect that the midichlorians will also be excised from Adywan's edits.