Sarah Palin is still nothing more than a celebrity. She may be able to parlay that into something more, but she's not there by a long shot.
Reagan at the same point in his life had already demonstrated a depth of knowledge and intellect that Palin is presently unable to match.
To show where Reagan was at the same age as Palin, I like to point at his Eureka College Commencement Address, from 1957.
Just to be clear, Reagan wrote that himself. The speech demonstrates a fully-grown political philosophy and a deep understanding of the intellectual basis of what he was saying.
It's difficult to imagine Sarah Palin doing that. Maybe later ... not now.
The clear truth sounds so good. Thanks for being blunt.