Look at Mitanni's page 

Look at the Mitanni page http://en.wikipedia.org/wiki/Mitanni  you see the "See also" Hayasa-Azzi first link. Also read carefully of the Historiagraphy and consider the first part of the invading of Syria (Assyria) which Mitanni did. And of course its the Armenian Highland since Tigran the Great's time there was even a greater Armenia than the Mitanni take those parts of Armenian Highland. Also you see Nairi is there with a link to Armenia in Mitanni's page. So put Mitanni back in ethnogenesis. Even if you dont now as soon as Im ready with references and info it will be clear that Mitanni should be there. Like I said its not just about that but look at our timeline there is a gap from Haik to Hayasa more than 1000 year gap? I dont think thats how it is. What for 1000 years Armenians were nothing?? So let's get to the truth.