The speed limits on most residential roads are too low from a variety of factors, including tradition, policies, and desire for revenue or to generate PC to pull over drivers.

You don't drive 25 on residential roads, because you know this to be true. Neither do I, nor does anyone else.

Patently untrue. I do, sometimes slower. My kids’ friends live on these roads.

Yeah, well, I don't/can't drive, so maybe my perspective as a pedestrian is just different :)

Do you have any sources to backup your claims that that's too fast and is more unsafe than speeding?