Twelve years later, if there's still so much misconception about /dev/(u)random, has the man page been fixed?

Edit: can't count.

Yes. It’s mentioned at https://www.thomas-huehn.com/myths-about-urandom-revisited/

Of course, when searching for man urandom you still found the old versions at the top of the search results for years and years afterwards. And the German Wikipedia page will probably never change.