No one can take away the achievement , for years PS2 was like a monster , DS can sell better if it's still backed by Nintendo, and it should reach bigger markets .
The fact that the DS is a handheld and PS2 is a home console doubles the achievement , because handheld is not proffered by grownups, But the DS got something for them too
DS is going be the new king and will set the target for the next-gen winner to achieve.
The market expands, and the next winner will also have a chance to break DS record only if he gets it right