I have a hard time believing those numbers. Simply because as a Conservative I can`t fathom voting for Guiliani. He is not a Conservative, he should be running on the Democratic ticket. Ditto for Romney, and McCain is not much better.
Ron Paul is the most Conservative candidate in the field, period. Unfortunately for America, neoconservatives are allot closer to the Democratic party than RP is,even though they try to make people believe he is some sort of closet Democrat, its all spin.
One thing is certain, as long as the two party's can keep Americans engaged in the false Right vs Left paradigm, nothing will change. That of course is what both party's want most.