To me the DS beating PS2 is not all that impressive. Almost any family with multiple kids is going to have multiple DSs, and we actually have more than that for the times we are playing. Once one has a PS2, there is almost no need to get another unless the first one breaks. The DS has also gone through four hardware iterations and ships in multiple color versions of each, causing more sales for people who want to update or switch the looks. The PS2 on the other hand only had two major versions, and only shipped in a far fewer number of colors for each.