Doesn't that just mean they have confirmed it's compatible with 360? Although all 360 games must offer HDTV support obviously this isn't the case for the compatible Xbox games, and I doubt very much if Konami would put a HD option in a current-gen PES/WE. I can't comment whether the North American releases of the game offered that option, there's more chance they did as that market didn't need to 'soft-mod' the machine to get HD, it was there out of the box.
Still doubt it, although I'd love it to be true and it's great that they confirmed it works on 360.