I see it going west and I am a 407L myself.
Watch the video here: http://latimesblogs.latimes.com/lanow/2010/11/video-catches-mystery-missile-launch-off-la-coast.html
There is a helicopter in the forground, and you can see the jet crossing over the top of it. That means the bird is moving eastward, not westward. An object moving westerly would be receding.