Why do X360 exclusives sell more than PS3 exclusives?

[ethomaz]

My only problem with this list...

- Kinect Adventures can't be counted due obvious reasons.

I can accept...

- Gran Turismo 5: Prologue sold way more than that but I guess VGC don't track digital sales (FINE).
- Two game are not exclusives but it's fine just to compare PS360 (FINE).

Other fact...

- Some PS3 game are selling high number per week yet.