I do not see much point labeling people to much anyway.... The Image is the most important thing no matter who took it....As long as it get to the client on time!
Amen. Labels are just labels. And to expand on what counts when dealing with clients: Good organization, responsiveness, integrity, courtesy, professionalism, satisfying the client's needs, delivering what you promise, etc. All the same things that would apply to any business/client relationship.
As for the labels that the camera companies like to use, "Prosumer" is another one they often use to describe their mid range DSLR bodies.