Virtual American exceptionalism: "I don't think there are four million people in the world who really want to play online games every month," said Michael Pachter, a research analyst for Wedbush Morgan, a securities firm. "World of Warcraft is such an exception. I frankly think it's the buzz factor, and eventually it will come back to the mean, maybe a million subscribers."

"It may continue to grow in China," Mr. Pachter added, "but not in Europe or the U.S. We don't need the imaginary outlet to feel a sense of accomplishment here. It just doesn't work in the U.S. It just doesn't make any sense."