Damn, I saw this very scenario happen right in front of me yesterday in London rush hour traffic at the bottom of Balham hill on CS7. Middle-aged woman turns right in front of a guy doing about 35mph on his road bike. He fishtails, catapults, and slides on asphalt broadsiding the car at probably 15mph. I was on a mountain bike so I fortunately had greater stopping power. Still, there was only about a 1 second difference between him standing up and walking away (which he did) and full speed T-bone.

And this was on a London Cycle Superhighway during rush hour with dry pavement and perfect visibility. Up on Skyline Blvd it's way worse even when sunny because of the light shining through the redwoods.