It seems like the data in this is identical to the stuff that was leaked last time. My guess is that someone was able to gain (user level) access to one of the servers hosting the forums, and the best they were able to do is leak an old database that was around from the last breach. It smells like skiddies trying to stir up drama to me. The names of the people posting this crap on IRC are "SABU", "<ryan____", "robertlevin", and "illegal". Yeah they're fucking troll idiots.
You need only read all of the comments made by that account to get the answer to that. I actually have a pretty good idea of who it is, and we will wait to see if I'm proven right.