S2 and concert photography

I was lucky to get a used S2 kit with 30/70/120 at a decent price in November. Although I did not have high expectations for low light photography, I got the chance to try it out at a Christmas concert with a local band in Oslo. I did not go higher than ISO 320, so in general sharpness was a challenge due to subject movement, but I ended up with a good set of keepers, using the 30 and the 120 alternately. Positively surprised, but should probably have tried higher ISO.