Not 100% sure what all the fuss is about. Having watched the video of Miley Cyrus's performance at the VMAs and the "twerking" which caused so much outrage, I found that I was just bored.
Ms Cyrus wasn't doing anything that Madonna hadn't done before. Christina Aquilera and Britney Spears. Lady Gaga. All of them have pushed the boundaries of what's acceptable to see on stage during a pop performance.
There are arguments to be had over whether raunchy and 'outrageous' performances are empowering to women or are just another sign that they (the female performers) are in thrall to some sort of patriarchal influence. When all is said and done, the only person who knows whether they are being empowered or exploited is the performer herself.