In the WSJ, John McGinnis has this review of a book by Frank Colucci with the above title. Near the end is this tidbit:

It is implicit in Mr. Colucci's analysis that Justice Sotomayor will probably not have much influence on Justice Kennedy's decisions, despite their shared Catholic background. Justice Sotomayor's famous ­declaration--that a "wise Latina" will often come to a better judicial ruling than a white male--implies an ethnic-and-gender "essentialist" philosophy that is repugnant to Justice Kennedy's core individualism. If President Obama was hoping that Justice Sotomayor would sway the one vote that makes most ­constitutional law today, he may be disappointed.