I really don't think Wii Sports or Wii Play should be counted when comparing software sales. Wii Sports is bundled so even those who don't want it get it and Wii Play is bought for the controller. I am not saying we should ignore them altogether, just when comparing Wii/PS3/360. I bet without those two Wii would have lowest software sales and tie ratios of all 3 to be completely honest.
Manchester United 2008-09 Season - Trophies & Records