@davidaugust To a point. UI can only get you so far.
No one really has to explain the Google home page to a new user. Type something, get results.

But.

There's also a whole hidden lingo to the search box that can make it a very, very powerful tool indeed. And there is no way to communicate that the functionality is even there to end users.

How many Google users actually know there are techniques that exist to do powerful searches?

And does that make the Google interface actually good?