The "significantly viewed" concept was explained in detail by Nitewatchwan here:http://www.avsforum.com/avs-vb/showt...7#post14811247
I have to say I disagree with you jimp about where people in Warren county would be considered residents of (or would consider themselves as residents). I would say most people who live north of Lebanon (e.g. Springboro, Waynesville, Corwin, Red Lion, Five Points, Lytle, Ridgeville, Utica, Dodds) consider themselves as part of, and are in fact part of, the greater Dayton community. Those in Lebanon either simply say they live in Lebanon or "between Dayton and Cincinnati," and those in Mason/Southern Warren County consider themselves as living in the suberbs of Cincinnati. So the arbitrary DMA/MSA line really needs to be revisited, or as has been suggested, simply combined altogether.
Anyway, just look at local news coverage. Dayton TV stations tend to cover Springboro exclusively. Cincinnati TV covers Mason/Loveland, and just about everybody ignores Lebanon altogether unless there is some big news there.
And, last I heard, the Dayton Daily News still delivers and covers all of Warren County (including Mason) has a very significant subscription base there (which may have declined a bit now that Hal McCoy is gone). Heck, the Dayton Daily News Distribution center is located in Warren County.