Most interesting and no, was not trying to demean anyone here. In fact, I'm most curious about that report you have. If you can click the link to my website, click on the contact form, and send me an e-mail, I'll repy back so I can get that screen grab. Most apprecaited.
The only thing I disagree with you on is where you referred to local builders using "inflated" values. This subject can get quite deep depending on what we're talking about.
For example, if we're talking "standard" types of homes (cookie cutter homes like ranches, colonials, etc...and with no customizations), we here on Long Island definitely use a standard $180 per square foot as the base factor. However, if we're talking about "custom" homes, that changes everything, as we now start looking past claim amounts given a particular ZIP code.
In fact, I can even e-mail you a replacement cost estimator from one of my carriers. It lists reconstruction costs based on ZIP codes using prior claim data...real world costs based on actual losses. You may find this interesting as values for most states & local zip codes are included within.