MarkB
Legend
http://www.youtube.com/watch?feature=player_detailpage&v=GGVJ4vbwHio#t=28s
While I am not a practitioner of taekwondo, nor do I approve of it as a combat style, this clip shows just how easy it is to disarm a weapon without application of egregious force.
It takes less than about five pounds of force, regardless of how well the opponent has a hold of his weapon. The wrist folds inward causing the fingers to extend, your other hand claps it out of their grip without any effort at all.
I haven't found a weapon I couldn't do it to, ranging all the way up to an AK47 and all the way down to a SEAL's SOG knife (about a three inch blade).
Would that sort of disarm be part of what basket hilts on certain swords are intended to counter? Or are those purely about deflecting weapon attacks to the hand?