Take a look at the 2010 map.
If Palin wins the McCain states from 2008, plus the states that her endorsed candidates won in 2010, she wins in a landslide. Many of those states went Republican in the governorship, the state legislature, and House and Senate seats. Some turned completely RED (republican)
The vast majority of her endorsed candidates won, despite the media focus on a couple loses, and the beltway elites blaming her for losing the Senate (so bogus, as she was instrumental in the record victory in the house and governorships)
She and the Tea Party are the wild card. and the movement is just getting rolling.
Just because someone is adept at picking and endorsing local candidates, doesn’t mean that their subsequent election was as the result of her endorsement. Perhaps Sarah is better served as being a new Rove...
And comparisons to Reagan are dangerous...they have the same ideals (which I like), but not the same pedigree.
Reagan was a national figure for almost two decades before he was elected...he served two terms as the Governor of the largest state in the Union. Successful terms too.
Sarah had promise, I hope she continues to fuel the fire of the Tea Party and Conservatism. But I am not as convinced as you that she is electable nationally.