LeBron has for the most part been playing out of his mind in these playoffs.
But as far as his FG shooting goes, I'm with Stan Van Gundy on this one. Anytime LeBron is in the paint or misses a shot, he's going to the free throw line. Now, he's also made some ridiculously difficult shots in this playoff run. But, if we're just talking about his FG%, that's greatly helped by the fact that he's going to the free throw line 14 times a game. Those missed shots when he "gets" the foul, don't count against his FG%.
For everything else, LeBron deserves all the praise he gets. He's been phenomenal. But, I wouldn't give him too much credit for his FG%.