Sony's Expectations for GT5 Prologue

[Bodhesatva]

300k first week is near a 25 percent attach rate; is that how Gran Turismo sells in Japan? I thought it wasn't as front loaded as most RPGs are. AND it's a prologue, not an actual game -- 25 percent attach rate would be awesome for the full fledged game.

Not saying it isn't possible, just not sure how GT ends up working in Japan. I know it's very popular -- Sony's second most popular franchise, after Hot Shots Golf.