so like that previous poster said, i can imagine that the contractors have to adjust their "pitch" based on what they know of the specific HO. the contractor i am dealing with has responded quickly to the myriad of questions i asked.
on the other hand, i asked at one point "what makes the difference between a good install and a bad install" and his answer was "the install will speak for itself" where-as another contractor brought up specific issues. i think that the first contractor was just trying to be concise and non-technical which is fine, but it wasnt what i wanted to hear. once i started asking specific questions about drains, vents and hook ups his answers were detailed.