Hmmm, this is weird. I'm not getting the same effective wpf result from the character calculator page compared to when I do the math manually.
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loginArmor weight
Armor weight modified proficiency = base proficiency * (1 - 0.01 * effective armor weight)
Effective armor weight = 2*head armor weight + body armor weight + leg armor weight + 4*hand armor weight - 10
(Source: WaltF4, updated 31.7.2012 based on the new formula)
Using this I get an effective wpf of 106.72 instead of 101. I'm no math wiz, but I redid the equation several times to make sure and got the same result. Character calculator out of date after certain patch?