Don't know if anyone noticed... The website is derived from "whitepages", which has been around for many years, thus the old information, or lack thereof. Many years ago, when most phones were landlines, the address info may have come from the phonebook. Don't know where the age and "friends" info came from.
One of the parts that I thought was interesting, was that anyone can add info to the site (or correct current info). Hmmm...
What I really enjoyed, was putting in the addresses of places where we used to live... to see if any of our old neighbors or their kids were still around. Some surprises... Found the names of neighbors on Martha's Vineyard, in Vineyard Haven, who were there back in 1960. Still in the same house. Going back 50 years, and seeing the houses and neighborhoods we lived in, brings back fond memories...
In the neighborhood where we grew up... 70+ years ago, found familiar names and houses that look exactly the way they looked back then.
Scrolling around the neighborhood streets in QSView, found stores and theaters, and even the ice cream parlor that DW and I went to when we were 12 years old.
Note... If Street View has not come to your area, there will be no pics. Our current location only became available in the past 5 or 6 months.
I haven't dug into this to know, but suspect that Zillow and other sites that provide photos also come from Street View, and where not available, from the satellite view, including the close up "Bird's Eye View".
If the googlemobile goes by your house, go outside and wave....