It's not enough to just sit around and expect that your articles will bring you a good amount of traffic right after you submitted your articles for distribution.
Might as well think of some factors... Is your article worthy to be reprinted? Do the content and title ring a bell to most webmasters and publishers?
Questions like these are just some of the many factors that could greatly affect your article distribution results.
Some basic factors are:
1. Topic of your article...
Submitting your article to article sites and article announcement groups totally depends on the topic of your article, not all of these sites and groups accept general topic articles. Some groups (aprox. 30%) are niche or content-specific, meaning they only accept articles under specific topics, e.g. aainet group - accepts only internet related articles...
2. Your content
Submission sites are just tools, never think of them as an assurance that once your articles are distributed they are sure to bring you back big results. Article announcement groups and sites are just there to display your articles for readers (Who might be interested with your articles) and for publishers to pick your articles and reprint them in their site or ezine. Thus, getting greater results totally depends on your article, how interesting it is to readers and how it gets the publisher's attention/interest to make them publish it.
My advice, do not just write an article for the sake of distributing it and hoping to get traffic out of it. Write an article that will surely give you results after using the article distribution services and sites as tools for distribution.