That’s very unlucky…my guild mate got 5 Mythics in a 12 run Tormented Duriel. I got one from that run…another in the party got none.
What I don’t see much of are 2+ GA items.
My theory is that there’s a bit of code given at Character birth that effects “luck” cause my guild mate only tonight…got a mythic from a Goblin and one from the Main Chest on a T4 Horde. That’s way too lucky.