I don't know if there is a term for this or not, but how do you gauge how fast a camera takes a photo? i.e. some cameras you have to hold down the button for what seems like AGES before it takes a photo, and others u can hold it down for 1-2 seconds and it's done. Is there any specification that covers this? If not, do certain brands tend to be quicker than others? Canon, sony, nikon, olympus.....? edit: OK i guess this is simply called "Lag Time" is the only way to get accurate measurements of lag time from camera review sites, publications, etc?