I really get annoyed when people here advice others to vote purely based on talent and do not consider any other factors like region, faith, nationality etc.
When the show organizers have left the decision of voting to people, they will vote to only those whom they would like to see winning and that candidate may not be the best. And that decision may be based on number of factors.
When we all voted to Taj in the recent voting to choose the seven wonders, on what basis did we take the decision? Did we actually see/visit any of the other places or Taj for that matter and verified if Taj indeed was better than others places listed? We just voted Taj because we wanted the place in our country to come on top. Did we not show regional bias? If any one had adviced us to vote purely based on merit and not on regional bias, had we taken that advice-- hell not.
If there was a world beauty contest whose winner was to be selected based on worldwide voting and if an Indian lady was in final three, whom would we have voted? We would have voted Indian lady even if she was not the best. At least, I would have done so, no matter what others said. I would not have taken anybody's advice of voting based on purely merit.
Like it or not, there will be all sorts of biases when people vote. When the voting is left to them, they will do what they want to do. There is no point advicing others what to do.