I would argue that cyclists are more in tune with their environment, not being stuck in a metal box. In car ads, all the adverts advertise how quite it is inside in the cabin, a cyclist is out in the open with no obstacles around them, ie no pillars or roofs. A cyclist can see an awful lot more than a motorist too, therefore leading to quicker reaction time.
Also, now most modern road bike come with hydraulic disc brakes. With a bit of weight shifting on a bike and using your front and back breaks effectively, a skilled cyclist could most certain stop quicker than a car at 40kph.
No distractions? FFS Chicken John cycling at the 40Kph was doing his usual with his cameras and presumably watching for rabbits.
Seeing a lot more than motorists do doesn't necessarily lead to quicker reaction time.
Does Chicken John have those aforementioned Hydraulic disc brakes on his bike? He certainly doesn't have a bell on it