It's really hard to tell--the amount of swinging that goes on on a THF in abyssea is insane these days with another DW tier/haste/haste gear/atmas that help triple/double attack, etc. I keep meaning to look into those rumors I've heard about a minimum weapon delay to see how close we are and if we should start moving some of our haste/DW gear to other equipment.
So in short, no, but I don't think I could really tell if there was. All I know is that NM spike effects can just about kill my HP in a round or two if I don't turn quickly enough. Lost almost 2K HP the other day on Turul in a single round. ><