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!"
Yes 2 to 3 hours is the typical time taken to fully charge an empty battery in direct sunlight.
Engadget failed to mention that (according to the FAQ http://www.scottevest.com/v3_product_info/solar_faq.shtml) the solar panels can almost immediately charge a USB device even in partial sunlight whether or not the battery is fully charged, and that the battery will charge just fine in non-optimal conditions, it just takes longer.
I think they could have also taken the time to mention a couple of the other features of the solar panel add-on such as the fact that the panel is water resistant (rain okay, dunk in pool not) and removable. It can be used separately from the jacket, or folded up and stored when not needed.