McDermott has been excellent thus far. I don't think he's going to be scoring anywhere close to what he's doing in the regular season (going out on a ledge) but even against better defenders, he's going to be able to make threes because he needs such little time and space.
I didn't buy the Kyle Korver comparisons because I didn't think McDermott ran around as many screens but he's looking like Korver. He even has that little quick bounce pass to the screen setter that all the great screen runners like Ray, Klay, Korver, Rip Hamilton and Durant have in their arsenal. He's also a really quick study because in the first two games, he was not executing that pass. Bigs were able to hedge towards him without him making them pay. By the third game, he was.