Why do most games have more longevity in sales (legs) in Europe than in the US?

[carlove]

As a cheap Dutch-guy I always buy my games either: day-one with a price-mistake ( The game originally 55 euro's sold between 0 and 30 euro. I've gotten games for free before, day one). Or I buy it when it's cheap, later on ( 0% to 30% of its original price ).