Well, why not say "finds the rev in which a bug was introduces in an efficient way." Why bother me with further details? I don't care how - if the git team finds a better way to do it, fine.
A lot of potential git users won't be aware that binary search is what you want. You just lost those.
If it only mentioned that it finds the changeset introducing a bug, without saying how, or that it does it efficiently what would be the reason to use the command at all?