Well isn't that interesting...

Via the always interesting Instapundit, a link that shows the connection between dating success and language use has the following tidbit...

But some of his most interesting work has to do with power dynamics. He says that by analyzing language you can easily tell who among two people has power in a relationship, and their relative social status.
"It's amazingly simple," Pennebaker says, "Listen to the relative use of the word "I."
What you find is completely different from what most people would think. The person with the higher status uses the word "I" less.

President Obama is famous for using "I", "me", "mine" in preference to any other pronoun.  He really thinks of himself as having lower status? That no one will notice him unless he draws attention to himself? Highly revealing ...