I think consistency generally plays a huge role in these types of events. It's hard to really stand out when everyone is throwing down, but when you don't fall and still do big tricks every run the judges notice. That being said, LJ is one of the most consistent rail jam skiers there is, so it's really not that surprising to me that he's up there. It's why LJ wins R2R all the time...the shear number of tricks he throws down and lands is mind-blowing
Dom did good, but wasn't consistent, he fell a couple times...that and I don't think judges really get the point of the caribou on to the rail thing. Scrappy was another one who was throwing down, but just had a few wobbles here and there.
If you look at the podium, they all stayed on their feet the whole time, hit different sections of the course, threw big tricks, and did different tricks every run - and generally 3 tricks per run on top of that. Taking nothing away from the other finalists, but I see no problems with the podium.