I've added it. Thanks for pointing out the link, Tony.
On the question above of shutting the barn door after the cows have escaped, part of the answer has to do with sets that are not yet complete. Sometimes in the early leaked pictures the sets are not yet complete. Perhaps there are pieces for which the mold is not yet finished, so there are crudely carved prototypes. Or else the torso designs have not been finalized, and there are either stickers or old torsos in the early set examples that will be new printed torsos (and other elements) in the final product. LEGO doesn't want to say "hey, look at the great new sets" and have everyone say "it looks unfinished and shoddy", which can actually hurt the promotion of new sets.
Sometimes this even shows up with the "official" previews, such as the annual Toy Fairs. For instance, remember when the Star Wars AT-AT set was first previewed for retailers, the Snow Trooper helmets were kind of ugly hand-carved things. Also set designs have gone through several iterations. The Harry Potter Graveyard Duel set, for instance, had different iterations between the German and US Toy Fairs. Or for a true Castle example, when we first saw
set 8778, Border Ambush, instead of spears beneath the bridge there was a giant spider.
Bruce