Didn’t bother me too much – most residential roads in germany are 30kph (18.5mph) with arterial roads being 50kph (31mph), people manage just fine.
But not all residential roads are 30 km/h as some are 50 km/h but that isn’t the point as I agree with 20mph in these area’s its the arterial roads thats the stupid and from memory these roads are 100kmh in Germany? 🙂