Also, personally, I have nothing but respect for most doctorally-prepared psychologists. I will say, however, that many of them are "too nice" and don't use their doctoral title and many appear to be rather...informal (for lack of a better word). I've seen a few who don white coats, wear nice suits, and in general, appear very professional, whereas I have also seen some wear sandals, ponytails, facial hair galore, and rumpled Dockers, who look like social workers or assistant professors, not medical professionals.
I also hate to admit this, but I do look down upon master's level psychologists who, more often than not, function as psychometrists or CMH clinicians. Even MSWs tend to look down upon them.
Perhaps if more of the PhDs insisted on being called "Doctor" and held themselves out as being medical providers, other professionals would treat them better. You don't see dentists and optometrists who use their first names in professional settings, do you? Most dentists wear some form of smock or lab coat, etc. How you hold yourself out to others is very important in terms of professional image and status. I notice that more PsyDs than PhDs insist on being called "Doctor" and usually dress more professionally. I'm not sure why this is, but it does make an impact.
My two cents.
Zack