Haku traveling at the speed of light between the mirrors. This is his traveling speed between the mirrors. The databook states it as a fact. Haku's reaction isn't fast enough. This explains his defeat by Pre-TS KN0 Naruto. Think of it as a person pulling a trigger for example.
The Sound ninja can move from the speed of sound to super sonic speed. Also CM Sasuke effortlessly dodged a sonic boom while holding Sakura and Naruto.
Naruto traveling at hyper-sonic speed (mach 5).
Lee blitzing Gaara
Kakashi reacting to lightning twice
Itachi reacting to Kirin. Zetsu states it will hit the ground in 1/1000th of a second
Kisame's water bullets are light speed. The 2nd databook confirms it.
Speed of lightning is mach 17,498 estimated. The speed of light (in the vacuum of space) is mach 879,653. Current Naruto should have MHS (mach 167+) powerscaling speed with FTL reactions. Going off of the OBD high tiers are mach 140+. Naruto is just like Tsuna having FTL reactions. Talkin about inconsistencies.