I don't know about over-reaction, but yes, GregF seemed very aggravated by those pictures. With good reason, if you ask me.
How couldn't they be real? No fake can possibly be made to look that real (well, they could, I guess).
I don't know what the BZPers' problem with those sets are. 8-| The Matoran aren't the best (though I think they will look better when they are physically observed), but what's with all the disappointed posts about the Piraka? They are very different from former BIONICLE sets, yes, but they are extremely good. As GregF said, they should create as much interest as the Rahkshi. It's like BIONICLE sets go through these stages of evolution...
They could be fake, but I'm willing to place my bet (or rather vote) on that they are real. We'll see... ;) either way, I have a feeling I'm not going to be disappointed. :)
~AaronCrane--