I recently used my G9 to take low-light, no-flash, hand-held pictures at my niece's pinning ceremony for Nursing school. I was pleased with the ability to take available light pictures, and have some good results. Here are two shots to show a couple of examples.
ISO 800, 1/20 sec shutter;
ISO 3200, 1/8 second
These have not had any PP applied to them.