"Stitch-N-Bitch" good, "Oz" bad

From the NYTimes today, on the changing meaning of the word "bitch": And so the word that once defined a misogynistic double standard ("If a man is assertive, he's called ambitious; if a woman ...") now defines another: If a woman's called a bitch, she's powerful, formidable, a winner; if a man's called a bitch, he's shamefully weak.