I think the producers definitely do have a preference but have you noticed that most of the people who have a BIG following is because of how badly Simon destroys them! I don't care how much people like someone, I have my own preference. If the voters are acting like lambs, it sure isn't prominent this year.
Josh Gracin was a favorite last year IMO because of his affiliation with the military. I truly believe people who voted for him thought they were doing it to "support the troops"! There were weeks that he SHOULD have been gone but his followers Of course this was not half as obvious as the voting is this year, just one example.
Regardless, the ratings will have to plummet before they consider a change, and I don't see that happening.