I was tooling around on YouTube a couple of days ago and stumbled upon something I hadn't seen before. Jimmy Garvin had done a video where he shared some behind-the-scenes footage from during the Great American Bash '87. Garvin shot the footage himself and it shows all the talent clowning around in the locker room. You can tell some people (like Dusty Rhodes, Barry Windham and Jim Cornette - well, at first) seem uncomfortable breaking kayfabe on camera. Hawk does a lot of talking, and shows how he loads a blade to gig himself. And Cornette does some hilarious commentary.
It'd be fairly easy to figure out how much of the wrestling audience is made up of "Internet fans." (No, I'm not going to do it. YOU do it!) Get the stats on unique users for some of the major sites. WWE.com doesn't count.