I'll give Jett some credit where it's due. He hasn't really been a "scoop" guy for a long time now, but he did end up reporting that Bane was the villain for TDKR (very covertly on his forums mind you) a good month before the announcement when everyone else was still reporting stuff about Hugo Strange and The Riddler.
If anyone honestly think Jett doesn't have any sources as WB and just makes stuff up, they're flat out misinformed. Most have probably dried up, but at the very least he's got the same "guy" he's had since the beginning (who goes by an alias and is openly referred to as his oldest and most reliable source by Jett). BOF is kind of like AICN when it comes to scoops now. Both have been in the game since the very beginning of internet movie journalism, but the industry has changed a lot since then. More secretiveness, misinformation, random rumors being spread etc. But every once in a while they get something right.
I don't trust Jett any more or less than I do El Mayimbe. In fact I think they're about on par with each other when it comes to their accuracy with WB/DC scoops. I don't take what they say as gospel, but I don't outright dismiss it either.