An interview and advertisement in one.
Creative Labs interviewed Blizzard's Shane Dabiri about the sounds of World of Warcraft. It's possible that they wrote this:
"Our goal was to create an epic aural experience. With the world so vast, detailed, and beautiful, it was the sound team's job to make sure the audio matched what the players were seeing on screen. By creating rich ambient loops and having beautiful composed symphonic music, we believe that goal was achieved."
You can read the entire World of Warcraft Interview at Creative Labs.