The Richmond Hill 50 seems to be getting adhered to by the majority since the surface fixed itself a month or so ago. But to be honest someone going up there at 60 isn't really much of an issue as far as I'm concerned.
Much worse are the people who drive through residential areas far too quickly, very often members of the 42mph everywhere club.
I think 20 limits in all residential areas makes a lot of sense. The reality is that it will slow most people down to 30 or less, which is definitely a better situation than exists now where the limits are 30.
The standard of driving generally is horrendous though, so even if people slow down you're still going to get the non-indicators, the tailgaters, the corner-cutters, the incapable of maintaining a speeders and all the other examples of bad driving that I literally see on every commute carrying on as usual.