I certainly couldn't tell. But then again it's probably like gay people: there's no one "way" of being gay, though most of us think there is (the "camp" way). Similarly, you don't have to be Sadness to be depressed. High-functioning individuals can be depressed. Famous rich people can be depressed. Happy smiling people can be depressed. The numbers are definitely growing. It might be a good sign, considering how melancholy is often tied to intelligence, and has been since the ancient Greeks. It might be evidence of growing awareness of objective reality.