Thought I would share,
He sometimes logs on to djforum.com and there's a thread stating that all his progressive tracks sound the same. Well, he jumped in the convo, threw in some jokes of his own and submitted a mix for an all deadmau5 battle, that someone started a while back. He didn't read the rules, which states you have to end the mix with a specific track, but it's cool that he submitted something.
And yah, it is really the mau5. He sometimes jumps in our stickAm (cam)chatroom/Radio station, with and without his helmet.
I'm not trying to promote the site, but you do have to signup to view the thread.
http://djforum.com/forums/showthread.php?t=134505
Here's the thread that says his prog tracks sound the same. ( no signup required to read )
http://djforum.com/forums/showthread.php?t=133747