I don't think gamers care about who's first and who's not, because if the console itself can't provide the gamer what he wants, like proper Online, HD (seriously, this will be standard at some point, there's no denying), more games made for the core-market (both from Nintendo and the 3d-party), I don't really think it matters which one is the best-seller.
I find Wii extremely boring at the moment. After the big games that were released like two years ago (Metroid Prime, Galaxy, Twilight Princess, Brawl), I haven't had any interest for the Wii since.