he has also picked someone who will attract ..... AND moderate feminist liberals
If by "moderate" you mean feminist liberals who may be open to pro-life, the NRA, drilling in wildlife reserves, or Creationism (if indeed there are "feminist liberals" who would really go for any of that), I still think that any attraction will be far too weak.
The vast majority of women I've spoken with or have read comments from are still offended at the choice, believing that one of McCain's primary goals in Palin was to attract Hillary voters as if they'd only care that she is a woman. Now, these women may in time come to respect a few of Palin's positions. But I think that any group that we are going to label as feminist and liberal is going to feel the sting of the offense much longer and stronger than any respect for off-shore or refuge drilling. Generalizing, of course.