Chart Track has done a bit of responding themselves regarding the story about week 2 PS3 sales taking a plunge. Their view turns out to be the same as mine.

Company director Dorian Bloch said in an interview with Next Generation, “A figure of an 82% drop has leaked out but that alone means nothing. Given how much pent up demand there was for PS3 and given the sophistication of pre-order systems now, it really doesn’t mean anything.”

He added, “In almost all console launch scenarios, there has been no stock in a second week on sale. Sony, for a number of reasons, had extra stock available. So there really aren’t many comparable precedents for week two sales. Judging a console based on nine days on sale is just crazy. It doesn’t make any sense.”