They keep listing bit.ly's monopoly by way of Twitter. But there is a better solution to the whole URL shortening issue, how about Twitter assigned a fixed length to URLs. So a url in your tweet is say 5 or 6 characters. And it always converts to ">link" (that's 5 characters).

Done, the URL shortening destroying the internet problem is solved. We've had URL shorteners forever, they've only become an issue because of Twitter. Twitter should just do away with it all.