During season 4, I got the impression the voting for the final two was extremely close, especially considering the amount of people who seemed to favor Bo over Carrie on finale night.
But after hearing Bo (and the other contestants) openly admit that Carrie was consistently above everyone else every week, my impression is completely different.
Plus, the success of other Idol contestants (winner or otherwise) doesn't come close to Carrie's explosive success; that alone makes me think Carrie's success was larger than the show itself, even before her career followed.
I'm actually glad the show didn't reveal the results every week; when they reveal results or hint that one contestant is more popular than another, it seems to create backlash.
I'm convinced the judges praise/Adam's passionate fanbase are part of what cost him the win in his season.
Same seemed to happen with Lee as well; Crystal's hype was so carried away by the public and the fans, yet the votes went the other way during finale night.
If the judges/fans had treated Carrie like that, it could've very well drove Bo fans into overdrive and cost Carrie a win that could've otherwise been hers.