Is Twitter a conversation or a delivery system?

"Last week, when Indianapolis media tried to get it right about the fate of Colts coach Jim Caldwell, someone described Twitter as a 'conversation.' [Erroneous reports of Joe Paterno's death] Saturday proved that is no longer the case. Twitter is now every bit the conventional delivery system as a newspaper. If we are going to acknowledge that the media landscape is changing, and old ways are losing traction, we must begin to hold the newer methods to the same standards that we expected from their predecessors."