User blog comment:MilitaryBrat/Qui-Gon-Jinn vs Darth Vader/@comment-2006360-20120417091837/@comment-3195617-20120417215602

Qui-Gon trained Obi-Wan. That logic is kinda broken. He's no Mace Windu, but he's not a slouch.

Now Vader is Anakin in a weakened state, and would be weaker than his younger self towards the end of the Clone Wars.