People with a larger vocabulary use less body language. They can get their points across with words, because they know more of them (words). This is an easy way to tell someones level of education. When people come to a point they cant describe with a word they start tossing their arms around. I always like to watch peoples body language when they are talking on the phone. I used to work with a cook that would be holding a knife and talking to her husband at the same time. Needless to say she would swing that knife all over talking to him.