I don’t *think* it’s the bias thing (well, it always is to some extent). My pool is family, lifelong friends, past and present co-workers, and the like. It could certainly be my age. In my mid-40’s, most of contemporaries haven’t even had the opportunity to have owned the same house for 20 years.
That said, I’m not particularly mobile myself. I’ve lived in San Diego since 1978 and California since 1970. Most of the people I’m talking about share similar demographics with the exception of some poor Ohioans. I am a technology guy, so that might have a bit more of a mobility bent.
I’d say your street thing is certainly less anectodal, but you’re definitely right that it will still have a socio-economic bias. Let’s have some fun with this, you pick a zip code, then I’ll pick a street and we’ll see what the metrics are (and I promise to pick a street that can be found in a 1987 Thomas Guide…)
