Soar is a racial ability for Dracthyr. Similar to the flying mini-game, Dragonriding, Soar allowed Dracthyr to move through the air at speeds of up to around 930%. This led to some players testing the extremes of the ability along with their own ability to play the game by flying obstacle courses in older zones. Subsequently the top speed of Soar was reduced to around 640%.
Player Soul put together some comparisons so that we can all see exactly what that reduction in velocity looks like: