Couple reasons why you don't see us scoring 100 points...
1. Scoring 100 points as it is in college outside of OT, and even OT can be pushing it, is a big challenge. I don't have any numbers but I bet the number of 100 point games by one team in college basketball is pretty low
2. Oregon is one of the few times we've been able to run this season (78 possessions). Guess what? Against Jackson State there was 76 possessions, we scored 94 points. Against Arkansas St. there was 76 possessions, we scored 93. Most teams try to slow us down, especially on our court (only 61 possessions in the Oregon State game, only 62 possessions in the Wyoming game, etc.) which means that we are going to score less points.
If you don't think that home crowd noise creates an advantage for the home team you're fooling yourself. Nick Johnson said at the PAC 12 media day that The Keg is the toughest place to play in the West. The crowd can help a team pick up the intensity and the noise can affect the opponents teams shooting. Basketball game is a mental game as well and the crowd plays a role in the mental part of the game.