Demon Souls selling out in Japan?

[Darc Requiem]

Rainbird said:

Kotaku has got pictures of several stores in Japan with sold-out signs on their "Demon Souls"-games.

http://kotaku.com/5147816/ps3-exclusive-demon-souls-is-selling-out

So, is the game really popular or was the shipment just low?

 

Seems to be little of both actually. Its seems like the initial shipment was only 30,000. So it's is selling well and its shipment is low.