America is a noisy culture, unlike, say, Finland, which values silence. Individualism, dominant in the U.S. and Germany, promotes the direct, fast-paced style of communication associated with extraversion. Collectivistic societies, such as those in East Asia, value privacy and restraint, qualities more characteristic of introverts.
On occasion, I like to reread my grandfather's letters. While leafing through them, I'm saddened by what is being lost in modern communication. Soul-baring sentimentality isn't typically poured into text messages, tweets and emails. All too often, personal connections are brushed aside for the sake of convenience in a fast-paced world.