When the Kaiten was being explained Tenten said that chakra is emitted from all the holes in the body, and to do a certain Jutsu only certain holes are used and that Neji has mastered using all the holes. She didn't say it was a blood limit of the Hyuuga. I'm sure someon like Kakashi could copy it if Sasuke can't... since Kakashi is supposed to be Konoha's finest skill user.

I think the Hyuuga clan is overated. just because they didnt get some psycho in their family that killed all of them off.... I'm sure the Uchiha clan would have outdone the Hyuuga clan.