I also lurk on SDN and I find that the posters that detest nurses and APRN's are usually the med students, or PGY's. The attending's with quite a few years under their belts are less threatened by APRN's, they have a better understanding of the RN role and NP role.
The third year med students on my unit exude this kind of attitude. Although, they are quite rude to the MD as well, they will barge into his office while he is dictating, or on a phone consult and sit there and wait for him to finish so they can ask questions.
I do agree with Jules in that I think that more medical and less nursing theory would be a good thing.