Board Thread:Naruto Discussions/@comment-26090730-20160429140452/@comment-734582-20160502110130

BerserkerPhantom wrote: But what good is knowing how to do something without knowing how to approach doing it? O.o Again, reading too much into this. Naruto took a sword to the gut. He didn't die, he just shrugged it off. Facing a guy with Mangekyou Sharingan and not expecting rare powers was just an oversight, and Kurama basically said he was overreacting to being stabbed. Which isn't weird, it was probably a while since he had any injury, and the reminder of what it felt like was unpleasant to Naruto.

That's all there is to it, he should've been on guard for special powers and he overreacted to being stabbed. He was walking around just fine a few panels later. Against the other Shin he corrected himself and just defeated them easily with shadowclones and Kurama's presence, showing that he wasn't rusty at all.

So the conclusion is, what Kurama said wasn't more than a "hey man pay attention and don't be a pussy about the sword thing, you're fine"