I must preface by saying that I am new to the sport of skydiving...but a veteran (infantryman) and old to other "exciting" sports (motorcycle road racing being one of them) and I think many parallels can be drawn. First off, I would think that mainly what a new camera jumper needs to adjust to would not be the equipment itself, but the distraction it poses or maybe even the drive to push a little harder to make the video a bit cooler (very common with motorcycles). With that, I think that it has a lot to do with the individual jumper and his respect for the sport. For example, mounting a camera on a motorcycle doesn't in any way affect the handling of the bike. It sits on the gas tank, weighs very little (especially considering these 400 lb bikes are nearing 200 hp), and is kept out of the relative wind by the windscreen. I could put a camera on any motorcycle on the planet and ride it as safely as I ride anything else. But the guy standing next to me could put a camera on a 50cc dirtbike and find a way to kill himself. With that, obviously that's not the only distraction that would come from flying a camera, but I think an individual that is highly trained in dealing with many different factors in a high stress environment would be more apt to take the new element in stride and be safer than his civilian counterpart.
In addition, we all know the guy that jumped fifty million times to pass aff, and the guy that sailed. Somebody with 100 jumps that just learned how to side slide yesterday and doesn't read up and study will be much less safe than the DEDICATED jumper with 100 jumps. It seems those numbers are more of a guideline in essence.