Let the hive mind of Engadget get that for you.
"We need a digital camera that can be switched on and fire off that first shot fast. It's not a commonly tracked statistic on any review site, and nobody seems to have this information for every camera. We were hoping other readers could inform us as to what small digital cameras can fire off their first pics in under a second (ideally under half a second). It needs to be small, but mostly, just really quick in operation. Thanks!"
If this works with 5.1 it would solve a big problem for me since my rear speakers have had to be awkwardly positioned and I'm always feeling I'm not getting all the benefits of surround. Anyone know?