I have mixed feelings about code reviews. It seems like sometimes they're an opportunity to show off so every review _will_ find something insignificant; sometimes code reviews are rubber stamps and just not useful. There's a balance though where you get concise thoughtful responses.

It seems like there is something about pairing though that guarantees a focus on shallow insignificance. I don't like dismissing something that has smart proponents but I just can't find a way to make pair programming anything other than negative. The real time aspect rules out depth.