no, actually its not, and if you look at the recent histories of the leagues, it's the same teams always wining in the NBA
http://en.wikipedia.org/wiki/List_of_NBA_champions - there is some credibility to that; since the MJ/Bulls dynasty's final win in 1998 only six different teams (Celtics, Heat, Lakers, Mavericks, Pistons, Spurs) have won the title.