Quite so. Acolytes like you will have to help the US population (71% of whom think that Joan of Arc is not qualified to be the president) see the light, help them see the error of their ways and to seek salvation by voting for Joan of Arc (so that she can sweep all 50 states in 2012 ad bring paradise to USA).
Actually, I think the average American voter is pretty smart. They are an integral part of that great country, and didn't get to be so big and successful by being stupid.
So, I have no doubt that it will become evident to them that a time for real change is coming. Much of that will come from the fact that President Obama has made some mistakes, some of which he can't reverse. The members of that silent majority don't appear on forums or make a lot of noise...they just quietly tally up the negatives and positives as results occur. So far, there aren't any results, nor are there likely to be, because President Obama and his group bit off a bit more than they are able to chew. Promises (Gitmo) and initiatives (health care) have gone nowhere, so Year 2 is much like Year 1. Except now, the honeymoon is long forgotten.
And the average voter will be seeking reasons for the failures and lack of performance. It really has nothing to do with right and left - it has to do with the quality of leadership. The "General Manager" of the U.S. has to be first and foremost, a person that can get things done through a wide variety of people. This requires someone who isn't caught up in their own political rhetoric, but rather, someone who can relate to the needs of the average voter. Sarah will be the one. And she has governorship experience, which means she understands the basic mechanics of the job.
Not being a specialist (like a foreign affairs expert) is actually a plus, because she won't get in the way of good diplomacy...i.e., let the people do their jobs, and she provides the direction for them.
I'm not sure of your prediction of her sweeping all 50 States (you are a bit extreme there) but I don't think that's a requirement for winning.