I know I won't be making a lot of fans by saying this, but from my observation there seems to be a lot more WOW or "better" photos posted in the 5D and 5D II unite threads compared to the 5D III. Not saying that there aren't any in the 5D III thread, but it seems like a lot more amateurs wanting to get the next best thing (I'm one of thoseops while the more experienced and pro photographers feel that their equipment works for them well, so why change it. I had the 5D II and I still think that it's a great camera despite the AF. I look through my photos and see nothing different and can't even tell which ones I've taken on the II or III.
Perhaps it's the fact that those threads have been around longer. I apologize and don't mean to disrespect anyone who owns a 5D III and posted something here. They are all good photos and I'm just talking about those photos which I do a double take on because it's just that good.