I just read the OP, so forgive me if I am repeating what may have already been stated... I was among the crowd that had KR ruled out as ever coming back. It is more than a miracle that he has use of his left arm, it is his shear desire to be the best and I have learned to never rule him out of anything. I was never much of a fan of his but think that I am now, just out of respect of his efforts to come back strong, healthy and competitive.
Any of us that ride and got hurt, know how hard it is to physically get over an injury. Then we have the mental thing to get over too. KR found a way to come back and race with the best in the world while staying competitive and a real contender for a win. I expect him to continue to improve and get stronger and a win could push him to even better results.