on lwn there is a comment (under the GNOME survey topic) http://lwn.net/Articles/313435/
The Shlomi Fish "Better SCM" site for example is very clear that Git won't do a merge across a rename. It even has a citation for this claim. But as a Git user who has actually done a merge across a rename I know it works just fine, and anyone familiar with Git's internals will guess immediately why. Yet probably there is no line of documentation on the Git site or elsewhere that I can quote to justify adding a "Yes" to the comparison.
sounds like a missing piece of documentation that someone should be able to fill in fairly easily.
David Lang