@Vette
I'll give that, yes. I was mostly looking at numbers compared to total consoles sold, considering the...ah...what's the word...fanaticism of the fans. So alright, I'll throw out my MGS4 comparison. After that, it's mostly trends I'm thinking of. GT3: A-Spec did sell early, that's true, but if GT4 sold at 70m consoles, obviously there was a slight downward trend of sales in comparison to total consoles.
Either way, just consider me the low end guy. I feel it's realistic. But as said, if my numbers get crushed, I shall be the first person to tip my hat and admit defeat.