I went to a friend's daughters dance recital last weekend. It was my first chance to really try out the ISO 3200 setting. I was pretty impressed. I used shutter priority and was at 100/125 most of the time - learned that wasn't quite fast enough out at 300mm! Even though we were in the 6th row, I still had to contend with peoples heads. Irritating but not much I could do with my kids in tow. Here a few fun shots. I also posted one that I converted to B&W on PC.
I've done some cropping on all of these. I was pretty interested in the ballerina shadows on the wall - I'm sure the people behind me thought I was strange to be photographing the wall instead of the dancers. I posted the best I took although it's not really good. Got to keep practicing!