Final answer:
The Rochester Method involves spelling out words using finger spelling, which, compared to other sign languages like ASL, is not generally considered 'extremely efficient' for communication.
Step-by-step explanation:
The Rochester Method is a method of communication that is not widely recognized as 'extremely efficient' when compared to other modern methods. It is a manual communication system that was historically used in the education of deaf students. Instead of using sign language, the Rochester Method relies on spelling out words using finger spelling. Each letter of a word is finger spelled individually, which can be a slow process compared to other forms of sign language like American Sign Language (ASL), which uses signs for whole words and concepts.
Efficiency in communication methods can vary depending on the situation and the users' proficiency. For general communication, particularly between deaf individuals or in the deaf community, ASL and other sign languages are likely to be more efficient. The Rochester Method could be considered efficient in certain educational contexts or for specific purposes, such as teaching spelling or when precise clarity of individual letters is required. However, as a primary means of everyday communication, it would not be considered extremely efficient by modern standards.