I think that powayseller is absolutely correct. However, pointing out a person’s defects or motivations to his face is never polite. Like my mom told me, there are certain things that you know or think but you may never talk about.
powayseller could have simply said “I beg to differ with Jim; Jim is a Realtor so please view his comments in that light. Now here what I think the market will do ….” We’re not in front of a Jury so there is no need to debunk someone’s argument. The exception is David Lereah or GWB, ha.ha. Actually, I think that powayseller’s style is kinda like Donald Rumsfeld’s (which I kinda like).