It's a family friendly affair and the last time I went the music seemed to reflect this, being fairly middle of the road - as Stephen put it, why do all the bands involve 'funk' in some way, which seems to mainly mean they jam on without having any real tune? This year, the organisers upped the ante and perhaps went out on a bit of a limb with the acts that performed as the day progressed. We got there at about 2 and saw Breezy Lee who had a good voice but probably fell more into the category of family friendly. Same for the band following them, who were upbeat and non-polarising. Just good background music to give the place a bit of atmosphere.
The two bands after this though I really liked - they were bands I would actually want to see outside of a day festival and would see again. One was bringing gypsy swing to Crystal Palace, and I would have had my knees up dancing around to them as they finished had I not been wearing impossible heels. And the final act, Metamono, was not at all about being a crowd-pleaser - unless that crowd was into heavy beats with a dubstep twist. After a slightly dubious start with some droning vocals that my friend rightly identified as not sounding out of place in a Mighty Boosh episode, they got going and so did the crowd, with old and young moving their bodies to the basslines.