I don't think this is quite accurate. Oregon's defense is a work in progress, to put it mildly, but, during the Pac 12 and NCAA Tournaments, I believe that they've held all of their opponents below their season scoring averages. Here are the totals: 47 (Colorado), 62 (UCLA), 57 (Stanford), 45 (Seattle), 73 (Minnesota), and 69 (Central Michigan). Not all of these teams are world beaters, but several are very good, and both Minnesota and Central Michigan are among the highest scoring Division 1 teams this year. Additionally, an A&M team that scored 84 against Notre Dame yesterday failed to break 70 in two games against Oregon this year--one at home in College Station and one on a neutral court. All of this could be a fluke, I suppose, and I'm not claiming that Oregon defends like Mississippi State, let alone UCONN, but they seem to be doing better recently than a lot of folks have noticed.