Yes, you can't share a complex thought or a novel over twitter, but you can share a link.
Sasha Frere-Jones: Good Things About Twitter : The New Yorker
But Thomas Jones at the London Review of Books points out that Franzen makes a “category error” by pitching Twitter users against serious readers/writers. The two co�xist, happily. Maud Newton and Sarah Weinman are some of the closest readers I know, and using Twitter has not hampered their ability to create arguments or to be serious. Authors are on Twitter: Shelia Heti, Lynne Tillman, Margaret Atwood, Colson Whitehead, and Neil Gaiman come to mind most quickly, though they are hardly alone.
One of the most felicitous uses of Twitter is to promote long-form nonfiction by circulating a blurb leading to the full text. Since the practice started, people have shared current long magazine and newspaper pieces and dusted off archival ones. Now organizations like @longform and @longreads and @TheByliner work specifically to find and share excellent pieces that stretch up to three thousand words and beyond. Before Twitter, I was reading half as much extended nonfiction and fiction as I do now on the iPhone or iPad, using apps like Readability and Instapaper.
Two pernicious fallacies embedded in criticism of Twitter—and, by extension, blogs, tumblrs, and GIFs of catbots who kill with laser eyes—are that non-traditional forms of expression can wipe out existing ones, and that these forms are somehow impoverished. The variables unique to the Internet—hyperlinks, GIFs, chat, comments—have enabled new writing voices with their own distinct syntaxes. But we are not dealing with fungible goods—the new forms will never push out older ones because they’re insufficiently similar. You might overdose on unicorn GIFs and go to bed too tired to read “Freedom,” but unicorn GIFs will never replace “Freedom.”