Oregon is yet another college team that is only as good as their quarterback. Chip Kelly and their offensive schemes were fantastic, but if you don't have a QB to make the plays, it doesn't really matter. I think Adams is good enough to put up a lot of points for them, and they certainly have enough skill guys around him to make plays, but I don't think they will get the QB play they need to put up 40+ on anyone.
The reason they need to put up 40+ on anyone, because their defense is not good. They are actively bad. Any good offense is going to score a ton of points on the Ducks this year, and if the offense isn't what they've been for the past decade, well, they are no better than an above average team. They are a rich man's Texas Tech, maybe Baylor, but certainly nothing more.