Like I said, if you know the game, you'd know. Their length, athleticism and knowledge of the Spurs most basic sets disrupts the Spurs timing and rhythm on offense and makes them play more one on one than they're accustomed to; Duncan and Splitter almost always struggle against them; despite the fact that they're not a good outside shooting team they almost always shoot well from mid range and beyond against the Spurs; in general, the Spurs are rarely the ones controlling the game. In two of the three instances I can recall them doing so in recent years, they narrowly held on despite having significant leads and the third time they lost despite having a significant lead.
I don't think they elevated their game. I think they had almost everything align for them, from getting mostly healthy just in time for the playoffs, to the quality of the teams they played to the state of health those teams were in at the time, to the lack of experience those teams had at the stage of the playoffs they played them at. Because of this and their history from '07 prior, this has brainwashed much of the fan base into thinking everything's fine now.