Right now, the Oklahoma City Thunder defense is sitting near the top of the league (2nd in Defensive Rating), in large part because of opponents shooting just 32.2% from three. After the game against the Phoenix Suns, Billy Donovan pinned that improvement on better effort, saying that the team was running around more. See the quote below, per Royce Young:
So it's an absurdly long quote, but Billy Donovan gave what I thought was a very insightful answer when asked about the difference in this OKC team playing better against less-than-good teams as opposed to last season, which was a major issue.