I've read articles that question the accuracy of VGChartz data, sometimes, but generally speaking they can be relied upon. Which is what makes it so interesting that
an article on VGChartz points out that the Wii has just passed the lifetime sales record of the Nintendo GameCube. Throughout the years of its existence, the GameCube sold 21.545 million units. The Wii, out for a little more than a year, passed 21.490 million units as of February 9th, 2008. Selling at a rate in the hundreds of thousands of units per week, the Wii has most likely broken a curse that's plagued Nintendo since the launch of the SuperNES - a consistently shrinking hardware base. Every console that Nintendo has launched since the NES has attracted less buyers than the console before it. SuperNES sold less than the NES. N64 sold less than the SuperNES. Same with the GameCube. Not only has the Nintendo Wii blown by this record, it's on its way to being the best selling game console of all time, a title currently held by the Playstation 2. There's still a long way to go before that happens, though.