"Speed kills ... except for real estate." --Anonymous
People are using Twitter to share their experiences. They are also using it for crowdsourcing: posing questions and problems to a group of people.
They are hoping for a quick and useful reply. They tweet (post on Twitter) for advice. They tweet for referrals. They tweet for real estate advice. Yes, they tweet that they are looking for homes ... and Realtors. No kidding.