Many times the best vocal talent doesn't win the competition. Agree with SlighDawg that Elliott had the better voice of the finalists in AI5, he just lacked the charisma. Taylor wasn't the better vocalist, but WAS the best 'entertainer' as he connected with the audience far better than the others. Commercially, I think Daughtry will have the most success of the AI5 contestants.
The truth is incontovertible. Malice may attack it and ignorance may deride it, but in the end, there it is.