Oscar lost in the conference finals, LeBron lost in the conference finals, but now LeBron is one step from a title. The stats.
LeBron now at 5.6 Win Shares. ahead of Dirk's 2005-06 effort, and catching up to Tim Duncan's 5.9. At a rate of slightly under 0.3 Win Shares per 48, LeBron would need two games to catch and pass Duncan (believe me, LeBron does not want that) or a game where he gets .4 or more Win Shares (his amazing Game 6 against Boston netted him .5).
If LeBron has a huge Game 5 and wins the title and surpasses Duncan's record 5.9 Win Shares, an argument can be made that he has had the greatest single season playoff performance of all-time.