Just to give a different experience: a spur was recently added to a walking path near my house, bridging a stream and connecting to a road that you couldn't get to that way before. I reported it to Google (not even with coordinates, just saying there was a spur connecting to this road) and they updated it within days.

Not trying to invalidate these other experiences at all, and my own may not be representative, but apparently they can move fast at least sometimes.