So let's see...pro wrestling, big dollars, and there are more shows than that which are created and not just documentaries (of what happened). I guess in hindsight it's not all that surprising.
Still...I like some shows that are part scripted, part "reality." "MythBusters" comes to mind, as does "Billy the Exterminator" and "Storm Chasers." I even watched "Steven Seagal: Lawman" for a while. Of course, how about maybe the granddaddy of the reality genre, "Cops?" Who hasn't seen at least SOME "Cops?" I'm reasonably sure each of these is pure reality. Sure, for some of them like "MythBusters," it's not linear reality (that is to say, it's edited), but they don't script the results, just the premises.
Just kind of curious...how much of "American Chopper" you suppose was scripted for ratings?