Interesting dance images, it's ashame you're not recieving any comments. But that's this site for you. I've stopped posting because of the lack of comments back as compared to what I write.
But to get on with it, I like the fluid motion in the last two images, good choice of a slow shutter speed. Although the low stage lighting gave you not many options to increase it.
I do a lot of Dance photography which you can see on my web site www.auphotography.net. I have a few posted here on usefilm also.