tommy:
I've also heard the "residents move an average of 3 times" figure, but have no stats to back it up.
Local 'history' may or may not prove anything!
On my street, 16 homes. All but one built in late 2004 or early 2005. The other, late 2005.
Currently, all but one occupied by the original owners, most full time. The exception: original owners never did come, as one of them became sick, subsequently died. House was purchased soon thereafter (late 2006 or early 2007, if I recall correctly) and has been occupied by the same folks ever since.
That said, next door neighbor is building an addition on her house right now. I think she decided she liked the 'hood, but wanted more space!
So, who really knows?
I do suspect that someone could probably track sales/resales/moves, etc., by studying property tax bills and such. But, you know what? I'm not going to do all that work!
SWR