I dunno. When I lived in Washington State, people used to fear Canadian drivers. Something about their inability to translate kilometers into mph. ;)
I imagine that is often the case, at least for younger Canadian drivers. We left the imperial system for the metric wonderland in the 1970s, if you’re my age (67) you had some driving experience in mph, in any case, the vehicle speedometers up here show mph as a second feature and most people up here who travel across the border know that 100 km/hr is 60 mph etc (it’s actually 62 but whatever), and 80 km/hr is 50 mph.
I would fear Canadian drivers more for their erratic lane changes and the fact that many will come down for the day to splurge on fast food which they must consume on the road. :)