What pocket-sized point & shoot offers the shortest shutter lag?

I have the full complement of heavy duty SLR's (D7, T2i) and lenses. However, in many ocassions, a little pocket size camera (I currently have a Lumix TZ5) comes in really useful. For example, in concerts, where DSLR's are not allowed for the general public. So I'm looking for the best combo of zoom and short shutter lag. Suggestions? Experiences? Thanks