Errm... no it doesn't..

Quote.. "Cisco's TelePresence system comes with an extremely high cost and uses a private, proprietary network."

While the "high cost" piece is debatable (depends on the discount you receive I suppose) the "private, proprietary" network but is twaddle. Cisco Telepresence is just IP and uses the standard network as long as QoS is set up right. While partners may sell managed services using private networks, you don't have to buy these and there definitely no use of "proprietary" networks.