Absolutely not. If GTAIV was 360 exclusive, then possibly for a couple months, but not since the ps3 owners are getting it too.
Nintendo's worst enemy right now is themselves. They are wasting wonderful opportunities to leave the competition in the dust because of MAJOR supply issues. As the world goes towards HD, the wii may begin to lose SOME momentum. And, even if it doesn't, they are still pissing away a golden opportunity to land knockout punches.
PSN ID: Sorrow880
Gamertag: Sorrow80
Wii #: 8132 1076 3416 7450