Would a great relationship on average yield better results than a random relationship? 

Although most estate agents would admit to the value of developing great relationships, the willingness to invest the necessary time and interest is not a common trait in the industry. 
According to Alejandro Villanueva, real estate photographer  communication between the agent and the photographer is key to a successful assignment. 

This communication includes preparing the homeowner for the shoot and encouraging homeowners to do some research on the photographer and what to expect,