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Yeah it sucks that bad.
Unless your going for a smooth talking dwarf, who smooth talks other dwarves... in which case maybe you should rethink your character concept.
I realize this is off-topic and I don't mean to hijack the thread but since the question has already been answered, I don't feel guilty
Everytime I see the feat Thunder Twin, I can help but get a mental image of two twins, of opposing genders, placing their clentched fists against one another and saying "Thunder Twin powers, activate!"