Obviously Whitman will win the greater percentage of the vote, but Fiorina has a chance at a greater margin of victory over her runner-up (most likely Campbell though at this point I wouldn't rule DeVore out.) I still vote Whitman though.
My wild guess is that both women will win by at least 20% over their nearest rival. But yes Whitman is about a 75% favorite to win by a greater margin. And yes, I take tonight's SUSA poll seriously, in the context of everything else.
One other thing that pops into my head. So much money has been spent on these primary elections in CA, that maybe GOP voters sense, maybe just subconsciously, that unless you are able to self fund, in the tens of millions and beyond, you just can't cut it in CA statewide politics anymore for the top offices. And that means, for those without such resources, that you are viewed as just another deer in the headlights, waiting to be whacked by a horde of well equipped, ravenous jackals.