It's not about how long the article is because it's all about how the message is conveyed like getting straight to the point. Well, there are some people who make the article going in circles before getting to the point. There's also some who did it because they are required to do so since some signature campaigns have rules like # of characters for it to be eligible because if not then the post won't be counted or not eligible to be counted.
I agree with you. However, whether a piece of writing is judged as quality or not depends on its content. If it is long but meaningful then that is also good. However, if the writing is related to technical matters, it might be better to just answer as necessary so as not to confuse things. However, when discussing opinions, it is necessary to explain and give examples so that the argument seems longer
Wether the writting is long or short is not actually the issue because some times a well detailed information can be contained in a long write just like the unique writer here JJG while sometimes it's just the way some forum members feel they can russle up some merits of actually the text is long but some of these writters don't actually know what they are writing and feel it up with lots of gibberish which confuses the reader.