A lot of people think that Naruto's speed in Nine-Tails Chakra Mode is just raw speed. But Naruto did in fact use the Body Flicker in this mode and here's why.
Still not enough proof for you? Then allow me to explain how the Body Flicker works.
The Body Flicker Technique is a high speed movement technique, in which a ninja uses their chakra to increase their speed to phenomenal levels, and because Naruto is in Nine-Tails Chakra Mode, a mode that uses the Nine-Tails' chakra, it would make perfect sense as to why he gains an increase in speed because its from the Body Flicker.
The same thing applies to Raikage, by using his Lightning Armor in combination with the Body Flicker was able to dodge Amaterasu, and made him the fastest shinobi in the world after Minato's death.
How else was Naruto able to dodge the Raikage's Body Flicker?
It's because he was able to counter it with his own Body Flicker.
Then he became the fastest shinobi alive.
What do you guys think?