“According to the independent NPD Group, which tracks software sales in the United States, more than 33 million units of third-party Wii software sold in its first 20 months, compared with about 29 million units for Xbox 360 and about 20 million units for PS3 sold during each of their first 20 months on the market. NPD’s tally of third-party software sales 20 months after each console’s launch is the only way to make a direct, apples-to-apples comparison of the numbers. Wii remains the best-selling console of this generation.” – Nintendo statement

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