No and yes to your questions.
However, it would be fair to characterize a lot of American voters as ideologically based, so the fact that they are not informed about the details of what the candidates are proposing, with the numbers, with their backgrounds, etc. is irrelevant to their vote. That is, even if they knew exactly what each candidate was proposing they would still vote the same way.
I'm not convinced that the number of uninformed voters who would vote differently than they currently do is that large. The thing is that while both political parties engage in manipulation, half-truths and other forms of deception I think most voters generally know what each party stands for - the Republicans are socially conservative and want tax cuts, especially for the wealthy, while Democrats are socially liberal and support more government spending on things like healthcare and the environment. I don't think a lot of voters are confused about these basic principles, so I think they would still vote the way they do even with full information.
Of course, this doesn't mean that they know little about their candidates, the political process in the US, basic economics, etc. They may hold all kinds of mistaken views about the world - they may think that supply-side tax cuts increase revenues, they may think Obama is a muslim, etc. But my suspicion - which I can't prove - is that most of them would still vote the way they were going to vote anyway. The worst low information voters make decisions based on the personalities and public personas of the cadidates, so information NEVER enters the equation and probably wouldn't change it anyway.