I think the charr talk in Prophecies, no? They definately do in EotN. Also, the only new race are the asari, which are probably what he meant with 'Native American theme'. Druids, nature, shooting bows, dancing around fires, that stuff.
Don't try to make sense of video games and their lore. Could be worse, they could be adding pandas.
Well I never played/liked/cared for WoW.
The asari are the blue girls from Mass Effect. >< I guess you mean the Sylvari, well their theme don't remind me of native Americans at all, they are plants, and look like plants, they are inspired on elves from other lores, but without the good looks, so it kinda defeats the purpose.
I count EotN as the start of the lore destruction, they announced both games at the same time, so EotN was designed as a bridge. Suddenly, the norn and the asura pop out of nowhere at the same time, and then the char happens to talk in human language (no I don't recall them talking in prophecies) and they seem to be some kind of tsunderes (Oh I'm so bad but still hang around with you for some reason) add the Silvari now to the mix in the last minute.
Prophecies, Factions and Nightfall, were all about humans, and I loved that every new region or culture was inspired in a real life theme.
Those are my gripes about the lore, but my main gripe about the game itself is the lack of complexity and the removal of secondary profession, the restricted build making, and the simplified skills, they even removed energy and energy management. Guild Wars was about designing good builds to complete challenges, mostly in group and make it fit like a puzzle. But if you look at the gameplay videos now, you'll see that GW2 is about going alone, doing your thing, and spam the same skills against lone mobs, just like in any random MMO. The sequel is a completely different genre.
Guild Wars 1 offered something unique and filled a niche, they are scrapping that to step into the overly saturated market of MMO. I just hope someone else make a proper sequel.