The replay rules allow the turnover if the defender clearly has the ball even when the whistle blows. I thought it was a bad call. Receiver's left arm looked down when he fumbled. At worse, it was simultaneous, which means the play should have stood as called.
i agree that was probably the worst call of season no lie. They blew the whistle about 10 times when the two people were fighting for the ball then 3 seconds later the guy picked up the ball, on top of that it was so close i dont know how they could overturn that. After watching the donagy segment on 60 minutes im starting to think the NFL wants two 18-0 teams playing in the super bowl, it would make it the most hyped sporting event in the history of the United States