a couple more quotes from the Adam Curtis "why music may be dying" FACT interview:

Mumford and Sons: “They are like 18^th century squires who ride out on the estate and go on the hovels where their fans live and tell them everything must stay the same. Mumford and Sons are the modern version of “you should know your place”. They’ve gone back to an old cultural folk music – some of which was very radical and a way of challenging power in the world – stripped it of any meaning, and reworked it into this nostalgic thing and put it together with stadium amplification. I can’t bear it, it makes me cry.” 

My sentiments exactly, although I stop short of tears...

Skrillex: “It’s extreme music which is kind of entertaining but it doesn’t tell you a story. It’s a mood, and to be rude it’s a zombie mood. Things like Skrillex are the remnants of the old music carrying on in a kind of zombie-like exaggerated way. It’s stuck, it’s not going anywhere.”