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The point of the model I used was to objectively compare the effects of the combat-style feats and style itself. It is not to be used to determine which style is the 'best' in the subjective terms. Variables like proc chances, weapon base damage, critical hit profile, player skill, etc. were not taken into account, as it wasn't the point to compare how 'good' one of the styles was. Additionally, I chose not to include any enhancements or Perfect Single/Two-(Handed/Weapon) fighting, because I just wanted to compare the three basic feats for each style.
In short, I tried to eliminate all the variables to focus on one aspect--the non-epic feat lines to determine whether or not it is justified to leave TWF out of the melee power goodness.
From the math, it looks like TWF will be behind, but it is a subjective answer, and there are too many variables to be absolutely certain. However, it is a good starting place for discussion.
Hope that clears up the point of math.