I suppose it's possible. There's a common theory that having a woman prominently on the slate increases the slate's performance across the board. Although Harris gets beat badly by Castor among women -- according to the Mason-Dixon poll.
Were they polling only Dems.....I really find this hard to accept.
In addition, Castor's tenure at FSU was not laudable especially in the handling of terrorist fundraiser Sami Al-Arian. In a campaign I would think that would come back to haunt her.