What do you think it is?
I thought it was because the information is not as compelling as they would like, and I suspect they are hoping for more stuff to be discovered in the meantime so as to flesh out their argument better.
I hope i'm wrong, and that their information lives up to it's hype. I just can't help but wonder why, if it's so good, that it needs to be spoon fed to us, but perhaps we are not the intended target anyways.
There really is no need to convince us, (We are already convinced that there's a rotten smell in all of this.) the proper targets are the skeptics, so in that regard, perhaps getting their arguments and evidence into a fool proof configuration is really the correct thing to do at this point.