Ummm what? Nintendo sold more games this generation than Microsoft or Sony did.
They always count Wii Sports which was a pack in game. It doesn't count. Remove that game from the list.
Look at vgchartz(they suck but it's easy to look up) for 2010, 2011, 2012. How many Wii games are in the top 10 sales? I did the work and have excluded free pack in titles(wii sports, wii sports resort, kinect adventures).
2010
Wii - 3 total software sales 94,522,343
360 - 2 total software sales 75,913,202
PS3 - 1 total software sales 55,644,982
2011
Wii - 2 total software sales 71,571,209
360 - 4 total software sales 87,901,223
PS3 - 1 total software sales 62,152,284
2012
Wii - 1 total software sales 38,915,977
360 - 3 total software sales 75,021,416
PS3 - 2 total software sales 48,666,929
As of 2013 the lifetime software sales are as follows. As you can see, the 360 leads by over 10 million.
Wii - 426,002,285
360 - 437,626,851
PS3 - 272,293,769
We can examine further and see the metacritic scores from each year. The Wii has the lowest average review score every single year while the PS3 has the highest.
2010
http://www.metacritic.com/feature/best-video-games-of-2010
2011
http://www.metacritic.com/feature/best-video-games-of-2011
2012
http://www.metacritic.com/feature/best-video-games-of-2012