Regarding the speed, the website says it's artifically limited, so I don't think you'll see these flying around at ridiculous speeds. It sounds like just included the beefy motor to power up San Francisco hills.

Here in Portland I think the laws would go unenforced for electric bicycles like in Copenhagen. I can't imagine any cop pulling someone over who isn't doing something stupid.

And laws can be changed. If these travel at roughly bicycle speeds, in bicycle right-of-ways, let's regulate them like bicycles, not cars.