I use these three terms (Master, Slave, Friend) to refer to the three positions from which and to which communication can be addressed. These are similar to the positions in Transactional Analysis of Parent, Child, and Adult. No one is a Master. They just speak, and perhaps think, from the Master position. No one is a Slave. They just speak from the Slave position.
MasterTalk seems extremely easy to identify in conversation and writing.