I have recently seen a huge number of links coming to some sites I monitor that are from 'microblogs' and the articles are only about 100 words long. They appear to be some sort of microblog network (maybe someone here knows which one) where each of the domains is unique and allows the autoposting of very short articles with one or two text links.
Since text links are not my thing, I have no idea if there is some sort of article network like that, but that is how it appears at first glance.
So the length of the article surely depends on where it is submitted or posted to.