Plano... I think your assessment of those agents who respond ONLY to high-priced questions would be valid.... IF in fact I believed that was true.
I reply all the time to questions that are not about a particular property at all (no price range at all)... without any thought as to whether I can "snag a client". And I see it done by many others, here on Trulia, on a regular basis. Regardless of any price tag on the property.
Yes, there are ClichÃ© agents out there, and probably in here... but clearly, we're not looking at the same responses.