Nope, it says exactly what I quoted ("prototyped properties"). It also provides an example that happens to be of the later kind (properties set on existing prototype.)
"It is not true if you assign a new object to the prototype
Which is a completely different thing."
Completely different from everything that falls under "prototyped properties"? I disagree.
All in all, my point is that if you don't know exactly how it works then there is a chance you might be misled by this #67. I am not arguing that it is "wrong".