140 chars will show how useful a tweet is. They entertain and even contain news. Hence athletes, celebs and media post. Most is fluff tho.
I don't want to detract from the efficiency of the post by expounding on this much further except to say that I got the idea to do this out of sheer laziness. However, after trying it out once or twice, I realize I would've saved more time by just writing a novel. Tweeting is freaking difficult.