But couldn't some of these stories relate to events happening at his former school per opposition to his new university?
Although he did write fabulations in the past, so far I haven't seen him do anything really deceitful other than to get a rise out of people. I talked to him on AIM before, and my impression is that he seems pretty legit and honest.
Nothing is guaranteed but I don't know, usually when someone accuses someone else of being a jc they're so excited of their discovery and impatient to debunk someone to gather pride as a reward, that they forget to thoroughly verify if the whole picture makes sense. You should wait for his version of the story too.