Re: Uzumaki closer to the SO6P?
Well, he could've just made two shadow clones, and poofed them, after making the rasengan. It wouldn't be the first time. I think he even did this earlier in the fight against a summons. Now, the Rasengan he made to defend Tsunade at the very beginning seemed to come out quickly. Either way, it's not an issue anymore if he practices because the Kyuubi chakra isn't going to mix with his constantly unless he wants it that way.
Originally Posted by Stein
Regarding the Uzumaki and their relation to the sage, I dunno. Madara cares more about the Senju because they torched his ass out of Konoha, and he's the only one who has really told history so far (long history, not recent), which leaves us to speculate.
I will say that they are more likely to be more closely related to the younger son than the father per se (just guessing).