I'm suspicious too: Nintendo deciding a cut based on Summer+crisis slump and a single week's sales, what's more PS3 Slim launch one, looks quite amateurish, way below market leader's business sense.
Given how long Slim's launch and price cut have been expected, it's likely Nintendo prepared in advance a possible cut if they really think is necessary, to avoid the uncomfortable situation to have to rush it, but they won't decide it based on Slim and Elite sales performance immediately after launch and price cut.







