Anyone else feel like pair programming is orthogonal to code review? Is the argument here that your pair partner is effectively always reviewing your code and vise versa? This has not been my experience.

Code review is more than just another pair of eyes. Its a place for someone with an outside perspective to start a discussion with you about some things that you might have missed. A pair programming partner will have missed exactly the same things you did while you were both neck deep in implementing the feature. You NEED the outside perspective to have a good review.