As a scientist looking for a PhD I would not reject advice from academics/postdocs/students from other sectors of research. Yes, there are differences between science and social science but there are also alot of similarities when producing primary research, papers, or theses. Sweetchic, I'm not going to tell you to apologise - this is a matter for you to decide; however, if you plan to remain in academia you should really learn how to deal with advice, and peoples differing opinions as throughout your career you will defending your research and fending off criticism.