I haven't made up my mind yet about Dani. She's only 16 (although she looks older), so I think the nerves got to her, plus it was a difficult song. But ALW was quite complimentary about her and it would be naive to think that the judges' remarks don't have an effect on the voting public. She also fits the 'look' for Dorothy better than some of the more talented singers.
People will do as they always do - vote for their own reasons and not necessarily on the best performance of the night.