So, True. And if you match that scene up with the one where he tells Frankie that the Corleone family used to be like the Roman Empire, you can see the emotional parallels that Duvall portrays.
Absolutely! Those scens go right up there with the "they shot Sonny on the causeway, he's dead" scene from GFI.
Brando, Pacino and Gazzo themselves are magnificent in those scenes. And of course Brando and Duvall, Gazzo and Duvall, and Pacino and Duvall feed off of each other in those scenes. But Duvall is just superb in everyone of them.
