I looked again, the Wii sold more, but have less developers. Also, the Wii is more family friendly, atleast from what games i've seen. Hell have you seen Dead Space, DOOM, or Silent Hill on the Wii? I haven't.. but i see a TON of party and family type games
What's wrong with friendly games? Zelda and Mario may be "family friendly" but they both are fantastic games that other developers dream to have their games as successful as them.