The case at hand is the disclosure of documents about the U.S., if you're unhappy about that then it's irrelevant if they were being fair or not and if you're happy about it then your comment seems an odd response to the news that Assange is at risk of being punished for aiding in the leaking of those documents.
What is going on in the background I have no idea, but just based on their own efforts to hype data they claimed to have and never release it made me question what they really valued.
Now a real journalist might have information they never release because they aren't sure if it is legit or sometimes even a government asks them to wait (kind a controversial there) but I don't see them claim to have solid evidence and then just not do anything with it. If I take Wikileaks at their word about their information, then I also have to wonder why they chose not to release information that they claimed to have / would release.... And that doesn't account for things like tipping off various politicians ahead of actual releases and etc.