Denver gave OKC the toughest series and even in that series, OKC had a few no-brainer blowouts and DEN stole Game 1 on a huge miracle of their own and a big OKC choke (kind of the theme in this postseason, teams just blowing games in the final 1-2 minutes despite having a sizable lead).
They've had a pretty dominant run with DEN mixed in. About to be 12-4, and good chance they'll finish the postseason 16-5 or 16-6. Boston went 16-3 last year for example.