Well my problems with countering it are:
1. It is easily feint spammed and with it's rapid speed it's harder than a katana to discern strike direction.
2. It's speed is faster than recovery time after a hit, so one mistake means you have no chance at all.
The 2nd is not even a grey area of whether it is skill, that is just way too fast for a fair weapon. The 1st is more subject to skill, but my point here would be that it takes an enormous amount of skill to beat it, but not much skill to use it.
AgentQ I see why you say to go and test this, normally I would but I have seen many people complain about this weapons speed in game, a spam speed faster than recovery speed does not need testing on my behalf, I have seen it happen to me and others, that is evidence enough. At level 24 I have 144 WPP in two handed weapins and 6 PS, so level is not a problem here.