Somewhat, a lawyer is a prostitute, but it does not mean they don't have a say in who they prostitute for. I can't imagine a liberal lawyer making a career out of prostituting for only conservatives. And a brilliant prostitute at that. It just doesn't compute. And he is married to a pro-life woman, and is a Catholic. The idea that he is a Souter is bazaar.
I don't think he will be another Souter either. I was just explaining the point of the article, i.e. there were other choices who have a more defined ideology and are more unlikely to become a Souter or Kennedy.