For me it is not so much the length as the formatting. In general, when I started I noticed I got far more comments and views on posts that were shorter. But since then I've discovered that no matter the length, people respond better to clearly formatted posts.
In fact, online, people tend not to read so much as skim (there are a couple studies on this, I'll have to go hunt them down...) So making your points stand out is extremely important. I use, for example, shorter paragraphs, bold text for the important bits, and break up long posts into two or three pieces with sub-headings for each one. That way people can scan the page and pick up on anything that looks interesting. Since I started doing these things I noticed that whether a post was long or short really had nothing to do with whether people read it.
So, to address your post specifically. . . While it's not actually that long, it is basically one big block of text that may make it hard for many people to read.