You have to consider why you're doing article marketing. One very valid reason to do article marketing is to establish a reputation for yourself. It's a way for people to find you. Another reason, one that is becoming less valid as time goes by, is for SEO purposes. As more and more people engage in SEO-specific article marketing it will become less and less effective. But article marketing will always work as a publicity device. So it depends what you're looking for. You can still get good traffic from submitting lots of articles today, but a year from now who knows? (at least with Google)