I've looked at this a little bit, and I think it's a great idea. I've been toying with the idea of trying some racing, and this seems a good way to break in. From what I can tell, the competitiveness can vary dramatically. For example, in Florida, I think there are lots of older guys, many of whom have decades of racing experience. Here in Massachusetts, I looked at the times and they definitely looked doable for someone in my category (well under 20 MPH as I recall). Of course, that might have been straight up a mountain for all I know, but I know I was encouraged.
One of my goals for this season is to try a race or two, and this looks a little less intimidating than jumping into a cat5 brawl.
Let us know how you make out!