Yeah. I noticed that the accuracy improves with wifi over edge only. Big brother is always watching.
I am assuming this has to do with the advent of internet phones and being able to find your house when dialing 911. It was a problem getting exact home locations in some areas a while ago (and some towns even still do not have strict enough standards in place for IP telelphones). Another poster mentioned on wifi his old address came up and on Edge it was correct - my guess is he moved and his ISP thinks he lives there still and has his IP addy assigned there still?