According to Capcom, if Okami didn't sell enough by 2009 there'd be no sequel. And there was. And as of 2013 Okami has sold 1.2 million copies (including the HD rerelease), with 600,000+ copies selling on the Wii and 500,000+ PS2 and 100,000+ on the PS3.
XD at a few Pros who are still in denial, yes, VGchartz isn't the most reliable source in the world, but it's certainly not that far off considering that we already have a pretty good idea of how well DmC fares in UK and Japan.
I'm not losing Hope until they reach the end of the 4th week. First week sales are usually for most games, not the majority sales. Hopefully it'll reach 650.000-750.000. These days I lose Hope for million sales. Prototype 2 didn't get them, and for some reason Darksiders II did, but I doubt this game or even Rising will get what they deserve (although due to the star power of Metal Gear, I do think it'll surpass a million for some reason).