Ramesh Ponnuru: "Palin has been governor for about two minutes."
David Frum: "But question: If it were your decision, and you were putting your country first, would you put an untested small-town mayor a heartbeat away from the presidency?"
Shannen Coffin: "if John McCain has said that a year plus of statewide office (plus some small town politics) is good enough, why isn't state legislature and a couple of visits to the floor of the U.S. Senate?"
Jonah Goldberg: "Downside: She may not be ready for primetime. The heartbeat-from-the-presidency issue is a real one."
All from rightwing National Review Online. There were plenty more questions from conservatives. It's hardly "liberal media bias" to ask questions of a VP candidate.