I think we often get better at detecting the underlying emotion with which the person is communicating, seeing beyond the one they are trying to communicate in an attempt to manipulate us. For example, they say that $100 is their final price but we can sense in the wavering of their voice that they might feel really worried that they will lose the deal. I don't think this will help us pick up on those cues because there are no underlying real emotions happening, maybe even feeding us many false impressions and making us worse at gauging underlying emotions.
