I have been commuting for 20 years plus.
About half the bike riders I come across in traffic ride faster than me and are very poor, dangerous and reckless riders. They really all ride like kants.
The other half ride slower than me and are are a danger to themselves, myself and other road users. They actually also ride like kants.
So yes, there are a lot of kants on bikes on our roads.
Come to think of it, I experience the same when I am in the car....