Kpu used MW Longsword when he dueled me. He did stab quite a lot, only few chambers if I recall right. Very fast reactions as well. Tor from my experience goes for left GLA swing and when opponent is blocking that he tries GLA stab to confuse the enemy and then left swing till death.
Also before I came on EU3, Kpu had a duel with Atze and won. I find Atze better macro feinter than Qoray so...
You cant judge a player by only one duel, no matter how good you are, there are plenty other factors that affect your skill, mood, psychology, luck, bad timing, etc etc.