Re: Rikudo Sennin update
I say sharinnegans... sorry, shinanigans on this topic.
RS was the father of ninjutsu. He had two sons; one with eye techniques, one with the body/chakra characteristics of the RS. The clans we are talking about are merely decendents. The elder son was not Uchiha or any other clan. The younger son was not Senju or Uzumaki or whatever. These clans are just groupings of decendents that share common threads of genetics with these individuals of the past. I'm still not certain we have a grasp on what the hell Madara wants to reform the RS.
But if we are going to compare the techniques, well all techniques spawn from RS. The Uzumaki sealing is no different than anyone elses (as RS invented sealing and whatnot) so it is a real leap to say these techniques are a direct leap to the RS and thus Uzumaki are any more special. In the end, the key link is the relation between Senju and Uzumaki, who share a common ancestor.