So, if we scale the Raikage to 1/3 of the speed of light, (Using lightning speed, and Kirin to scale), Naruto outsped him at Max speed. Assuming he's just as fast as the speed of lightning, not only did KCM Naruto outspeed him, he perception blitzed him. This scaling makes sense, due to comparable speed to Itachi, who perceived Kirin, while barely able to see. He was sick, and ill, and he still reacted to the point that he was able to throw up a Susanoo. This was Itachi at nearly his worst state, and he still reacted. Nagato was also perceiving Naruto and Itachi's speeds during their fight. No joke, when Itachi vanished from holding Nagato, Nagato immediately said "He's above you." We know the Rinnegan doesn't boost perception all that much, as Hidari couldn't use Chidori as effectively. Edo Nagato shouldn't have a perception buff, in fact because of being dead, he and Itachi should actually be (in terms of physical stats, like speed for speed) weaker.