This is a great thread. IMHO, I believe that crossover drivers make better racers in there chosen/favorite disipline. It is a fact that those that excelled on motorcycles and quads make better drivers. There mindset of line choice and watching forward and not right in front of themself is burnt in the brain already. While racing desert for many years, my biggest gain in speed was when I started practicing at motocross tracks. Never was great at motocross, but I improved my skill at turning, and carrying more speed over high speed jumps and obsticles because of confidence. So I believe a Desert Racer that crosses over between desert and short course is going to improve there skills in each disipline utilizing skill sets from both. One thing to remember short course requires an intence exhausting amount of focus and concentration for 20 to 45 minutes, Desert racing requires focus and concentration for hours and hours. Also it is easier to run a hard pace when you can see your competition right in front of you, try running alone in the desert and hold a competitive edge with nothing to judge pace.
I am not saying shortcourse guys can't do it the other way. I do know this, the people in the east that have never run in the western deserts have an opinion that everything is flat out wide open running on a flat desert. I've got news for you, This Desert Racer went woods riding in the east and kick the woods racers butts I was testing with in there own backyard. So easterners come out to the west and get a taste of Desert Racing or WORCS before thinking you guys are the best, you may come home with your tail between your legs!