LeBron, by the way, is third all time in WS/48 (win shares per 48 minutes) in the playoffs behind only Michael Jordan and George Mikan:
http://www.basketball-reference.com/..._career_p.html
So far in his career, he's one of the greatest postseason performers the sport has ever seen.
Also for reference, here's total playoff win shares (Jordan leads, but LeBron already edging into the top 10):
http://www.basketball-reference.com/..._career_p.html