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.
And two of those teams aren't from big markets, and one of them didn't even have a star.
Can't believe I forgot about Detroit, would've enhanced my argument
Maybe because I block those douches out in my mind.