We are talking about the Supreme Court, where the clear majority of Republican appointments have ended up liberal.
Only Souter and Stevens can be accurately called Liberal and neither nominating president was a strong conservative. Sandy and Kennedy were moderate conservatives by most reckoning.
Reinquist, Thomas and Scalia are clearly conservative. So the "majority" are not liberal. Just <30%. In my estimation the probability that Miers will join the gruesome twosome is much lower than that.