I also catch up that some people don't like to award Merit to a post that is shorter with cogent reasons and meaningful rather prefer a post that is large and contains a large numbers of articles, while those posts that is very ambiguous can as well contain More less vital informations that is valueless than the shorter Post, i have seen that newbies is adopting the system of long article with valueless point, so it's encouraging and admirable to make post that is lesser and have meaning, it's not that I'm condemning a long article writers post but we should understand the concept that your content of post at first also understand the summary of your point.
I think many long post, are knowledgeable that miserable one, two line posts, but for the exception of those copy and paste -plagarise-, or long posts that are against the rules.
but think differently when it's a reply, I think a short reply to a post can be very knowledgeable answers, and many of my admirers are always given short knowledgeable post and they have a their way in the first five reply of the post, further more before you give merit to a long or short post, read it.