I am not an expert on Shakespeare, but I understand he coined the phrase “brevity is the soul of wit” in Hamlet.
I am also not a big expert on, or fan of, Twitter. Perhaps if the communications weren’t referred to as “tweets”, they wouldn’t seem so undignified. As far as I can tell, the only redeeming quality of Twitter is brevity, which admittedly can be a valuable trait in this day and age.
Because each “tweet” has a 140 character maximum, “tweeters” are forced to communicate their complete “thought” (loosely defined) within that limitation.