That's nothing really new, they simply expanded upon an already existing theory. Since the launch of the game we have known that the kodan consider the norn to be their devolved cousins. Scratch that, we've known since before the launch of the game: https://web.archive.org/web/20130208175641/http://www.arena.net/blog/the-wisdom-and-power-of-the-kodan.
EDIT: But you know that, you linked it as a source.
For what its worth, I think it was worthwhile to actually get that lore manifesting in the game somehow. Once I realized that our narrative designer was doing this, it became influential to the work I was doing on the mastery for this map. It being part of a line called "Ancient Magic" was a sticking point for me anyhow.
Fortunately the aspects of Kodan lore that involve them watching over untamed spirits made for a harmonious spin-off into this little tale about one of the lost tribes carrying a sacred fire through the ages. Major credit goes to the community for uncovering that and documenting it here: https://wiki.guildwars2.com/wiki/Fl...
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