In my experience, the 70+ are bad at driving in ways that do lighter accidents. Typically: Drive 50 km/h everywhere, even if the road is 30 or 70. General weird behaviour. Swerving slowly left right left forever.

They do cause a lot of cursing, but they are signalling hard enough they're bad at driving and other drivers leave huge margins, overly grant right of way, don't cross the road, etc...