No - Brenda was 9 or ten seconds slower than that (got baton at about 12:45 at 4500m). Watch the video here (this Youtube page also has all the 800/1500 relay races).
http://www.youtube.com/channel/UCmAjwOe5V9uLqgD9pYU65Bw
The myth of a sub-four leg by Martinez was first perpetuated by the over-the-air commentator.