particle blast on landing based on fall distance rather than fall speed

If you fly around in creative mode, your landing may create massive particle effects for little to no fall distance/speed.

What I expected to happen:
Particle blast is bigger the faster you hit the ground.

What actually happens:
Particle blast is bigger based on blocks traveled.

How to recreate:
go in creative, start flying, ascend and descend a few times. Land slowly and from a short distance, notice that the particle blast is a lot bigger than it should be.

VIDEO I MADE!!--> http://youtu.be/L_-ujNd1EAw