According to NPD information obtained from Microsoft by GamesIndustry.biz, that Nintendo claim appears to be wrong:
Third party sales for X360 since launch of the Wii and PS3 is 54,065,728 units, almost double Wii's 33,394,311 units.
Since November 2006, X360 have 217,252 units per title, PS3 at 156,065 units and the Wii at 132,517 units.
16