Unlike Souter, this man and his wife actually was/is active in the beliefs and views his supporters are saying he holds. Everyone needs to get off the "stealth candidate, we're getting screwed again" pessimist bandwagon.
Souter did not belong to the Federalist Society or hang out with conservatives.
Reagan put Justice Kennedy on the court and Kennedy had a great conservative record for about 10 years and then the wheels fell off.
Renquist was a so-called "stealth candidate" nobody knew anything about...
I'm hopeful that Roberts will be an improvement over O'Connor. However, according to this Washington Post article, John G. Roberts Jr. has never been a member of the Federalist Society, despite widespread reports that he did belong.