This is definitely a big contribution by Sarah. However, I think her biggest contribution thus far is pointed out in this post on a thread in the wee hours of the morning by CondoleezaProtege:
without Palin's efforts and "death panels" statement, the healthcare bill would have passed BEFORE the scott brown election...and her comments had a lot to do with fundamentally shaping people's disconcertment over the issue.
Sarah Palin's leadership and voice for conservatism has already helped to "fundamentally shape" the will of the people in profound ways.
And some, even here, hate her for that!