Basically, all three manufacturers have quite some leeway dropping the price in Europe because of the euro's strength. Keep in mind we're paying 600$ for a 40gb ps3, 375$ for a wii and 360$ for a 360 (pro bundle).
The only one who used that leeway was MS (that was their march euro price cut) but they weren't doing that good. The latest priceslash coincides with similar moves in the states and japan and is more likely related to the introduction of jaspers which are cheaper to produce.








