That doesn't mean anything.

I think you've got a misconception here.

I've got the (German translation, my first language) of Rin no Sho in my hands right now, so I used a handscanner to show you this statement about Haku's speed , and it confirms he moves "mit Lichtgeschwindigkeit" (== with the Speed of Light ).

Furthermore the scans I linked to already before show exactly how Haku is worried about whether he will be fast enough to reach the next mirror ( despite his Lightspeed Movement ) , and then Kyuubi Chakra Cloak Enhanced Naruto proves Haku was NOT fast enough because he captured him.