there is no limit of submitting articles to the directories. but you should not submit the same article in more than 3 directories. if the articles you are submitting are unique then you can submit as much as you can write. ezinearticles is the best one to submit your creativity
That makes sense, but how many should I pos at a minimum to see results? I.e. 2 per month for three separate directories (6 submissions total)
very much correct...i completely agree with kutekutta....as long as quality and quantity of your articles go hand in hand it will be okay for you. but keep in mind to write the article so as to entice or drive the user to click on the link of your website or compel him to know more about you or your expertise.
It depends on what niche you are targeting. 6 submissions a month won't do jack in a niche like debt consolidation.