The score on DD's second was fair and he got a deserved 50. I'm not sold on his first. It was technically more difficult than Griffin's second, and took about the same number of tries. Problem was that the finish wasn't hard and the crowd didn't respond to it as well, maybe it being the first dunk and all. Judges get influenced by the crowd and that's why it was a 44.
He and Amir got out of sync on the first one and with 50 seconds remaining I began to doubt if he was going to pull it off and then immediately, bam! The stuff leading up to the dunk kind of threw it off for me a little and it seems like the crowd felt the same. That said, it was very similar to the dunk Iggy made which I felt was good enough to beat Nate a few years back.