http://www.wowwiki.com/Humans#At_the_dawn
- Confirms what we already know: Humans are decended from Vyrkul. Makes ABSOLUTELY NO MENTION of where Iron Vyrkul fit into the picture.
http://www.wowwiki.com/Gnomes#History Third Paragraph
- Ok, so that, at least, is confirmation for the gnomes being results of the Curse of Flesh.
http://www.wowwiki.com/Dwarf#Origin_and_evolution For good measure
- Not sure why you linked this, as I never disputed Earthen -> Dwarf evolution
http://www.wowwiki.com/Curse_of_Flesh#Afflicted_races And a little more for good reading.
- Except that, for the Vyrkul entry, nothing that could be considered "proof" or "source" material for the idea that Vurkul come from Cursed Iron Vyrkul is given. Heck, the entry even states that the Iron races (vyrkul / giant / dwarf) appear to have been created entirely seperately from the other titan creations.