My belief is that unlike the popular press, LeBron is not the kind of guy who shines, being down in a series. He's the type of person, where when things are going for him, he shines. Otherwise, he mails it in and then, ask for some trades to bring in better role players.
Thus, I believe that if BS's adjustments can grind out the first two games to a 'W', for the remainder of series, the Cavs will put in a lackluster effort and we'll dispatch with them in roughly 6 games. In at least two of those remaining contests, LeBron will post 40 to 50 pts, to pad his playoff stats, but in the end, he'll see that it was his teammates who'd let him down.
If the first two games are a split, all bets are off. The Cavs will most likely advance. The key is to psychologically beat them in the beginning. The rest will take care of itself.