^^^
Exactly. If the ped was crossing legally at a controlled crosswalk, then the cyclists is at fault. But if the ped just stepped out in front of the cyclist, then the ped is at fault. If the cyclist was doing 50 kph in a 30 kph zone, then the cyclist could certainly be found at fault. But I don't know how anyone could determine the cyclist's speed, unless his computer froze at the exact moment of impact.
But 50 kph isn't that astounding of a feat, it's only 26 mph. I can hit that in a hard sprint on my mountain bike with road tires. Someone with an equivalent or higher level of fitness as myself (of which there are many, I'm sure) could easily exceed that on a skinny tired road bike. Pro cyclists average 25 mph over the course of the TDF, and can hit 40 mph in hard sprints on flat terrain!