When I hear an X MOA I want to see it to be in both precision and accuracy, and in some meaningful amount of shots.
A nice cluster group of 3 is great precision and all, but if they all miss, then it is not accurate at all. If the cluster of 3 moves around, same problem. see:
http://www.ar15.com/forums/topic.html?b=3&f=118&t=279218
1000 yards is a long way out there for MOA in both precision and accuracy for any 308. Yes I have seen rifles/shooters that I would say fit that bill, but they are uber target rifles. Not rattling semis.
Don't get me wrong, I love the M-14, but I doubt a company with military contracts would put their name on a 1000 yard MOA claim. I'd love to see repeated ~5inch dispersion from the point of aim at 1000yards with a semi though. Heck. I enjoy seeing it with an ubertarget rifle.