Fox News said their polling shows fully 50% of Americans don’t want Palin as Potus. As for Newt and Romney, I don’t think they are going anywhere, except home ;-)
..and 53% of Americans voted for Obama.
One thing to point out is that we don’t even know if Palin will run, however, think of it in physics terms. For every action, there is an equal and opposite reaction. Right now Palin is just firing people up, however, when she comes up, there is a major negative reaction by those on the left. That causes supporters to react the opposite way and support her more (to the point of supporting her for the highest office in the land).
The right doesn’t want someone who gets along with the left, the right wants someone who drives the left nuts. So the more the left focuses on her and throws a fit, the more people are going to want to keep that reaction going.
Whether she is the best choice two years from now or whether she even runs or not is moot at this point. What is happening at this point is the reaction of the left.