Note that Romney, who is routinely castigated as a RINO at FR, receives just as much support from the "very conservative" group as does Duncan Hunter. This unlike Guiliani and McCain, whose support is from the "Somewhats". If Romney is a RINO, he must have done it by fooling those "very conservative" CA Republicans.
The survey also shows that the support between the candidates is divided among two mayor groups, the very conservative, and the somewhat conservative groups within the Republican Party.
Giuliani and McCain are even in the support each received from the somewhat conservative group.
Giuliani has 50% of their support, while McCain received 50.6% of the support.
Most of the other candidates [including Romney] received support in the 60% range from the very conservative group.