This is what happened.
I never expected Uncharted to sell 800k a week.
but, we kept getting the pre-orders info, plus a couple weeks before release, ioi predicted over a million based on America's pre-order numbers, so many fans took as fact and started predicting over 1 million all over the place, forgetting America is not the world and Others is where the PS3 gets its legs from rather than big weeks.
I remember people going as high as 500k before that, so please enough with your disappointment, be disappointed in your bad prediction based on nothing but hope.