Well that's a new term...
I tried to check for the backlinks of house.info and found 811 backlinks.
For the keyword "Boston Real Estate" (with or without the double quotes), Google's top result is
Homes - Boston.com which has a
PR of 7.
house.info only has a
PR of 4.
boston.ma.house.info has a
PR of 5 and backlinks of only 17 but never came out on the first page of my search at Google. It might have been the average number of viewers regularly visiting boston.ma.house.info that gave it that rank.