There’s an entry on Language Log, How fast do people talk in court? [1]” by Mark Lieberman that should be of interest to court admins, translators, reporters and some litigation lawyers. He and a colleague are doing a study to determine what are typical rates of speech in courts or depositions, so that court reporter tests can be useful. (There are also a couple of related entries referred to, one on the old court stenograph [2], and another on “voice writing [3].”) And as for fast talking, you should check out the excerpt on YouTube from the Little Britain show, “Vicky Pollard in court [4].”