> No, but neither is there quantitative evidence that code reviews help improve software quality.
You might want to check out the book "Code Complete", which says in Chapter 24:
"...the average defect detection rate is only 25 percent for unit testing, 35 percent for function testing, and 45 percent for integration testing. In contrast, the average effectiveness of design and code inspections are 55 and 60 percent."
I got rid of them here because I've personally never seen a beneficial affect at any of the places I've worked. Easy to spot bugs still made it to production. Crappy, inelegant code still made it to trunk.
Getting rid of code reviews and making developers personally responsible for what they commit has improved both of those aspects for us.