Board Thread:Wiki Discussions and Support/@comment-25977287-20150221003323/@comment-26134422-20150223025555

The Body Flicker and Hiraishin (Flying Thunder God) are two completely different techniques. The Hiraishin uses space-time ninjustu and markings to teleport the user, whereas the Body Flicker uses chakra to allow the user to travel at insane speeds. However, the Body Flicker is NOT teleportation, it only looks like it because it's so fast.

It is true that Minato is the fastest shinobi ever, and Tobirama is really fast as well, but they are using a completely different technique to obtain their speed. In fact, I doubt Minato or Tobirama are ever actually seen using the body flicker, I'm pretty sure we've only seen them use the Hiraishin (I could be wrong about this though). Also, it is because Minato has the Hiraishin and heightened reflexes that he is considered the fastest ever, NOT because he can run fast.