I would elaborate that, a version control system must assist in code review process by allowing to version control the unverified/reviewed code also in private

I would elaborate that, a version control system must assist in code review process by allowing to version control the unverified/reviewed code also in private branches. With RTC, it is hard enough to review the change history in trunk and its capabilities pale in comparison with say Tortoise SVN. That's why I feel that their first rule of their study is based on the shortcomings in RTC's jazz version control system. However the code review best practices came out of the study are solid. However they do not touch upon the version control practices.