I came accross an interesting study that indicates that verbal comminucation is far not the most effective way of coneying information. It turned out that our emotions and gestures can be more informative than words.
Here is the excerpt from the source:
"One study at UCLA indicated that up to 93 percent of communication effectiveness is determined by nonverbal cues. Another study indicated that the impact of a performance was determined 7 percent by the words used, 38 percent by voice quality, and 55 percent by the nonverbal communication."
Read more at: http://humanresources.about.com/od/interpersonalcommunicatio1/a/nonverbal_com.htm.