Nonverbal+Communication

It's said that 90% of all communication is nonverbal. This means that 90% of messages that you get across, intentionally or unintentionally, are carried over through actions, rather than what you vocally say. This can lead people into troublesome situations, which is the basis of every sitcom ever. What are your thoughts on this subject? Do you really think it's possible that almost everything you say can be said without actually saying anything? As always, remember that this is a school-sponsored Wiki.