I see a motive, I get my iPhone up, log in and starts a photo app, tap to focus, find the photo button and shoot. And horror, the motive is gone!
To do all this I've used 7 second: iPhone out of pockets – 1 sec., log in – 1 sec., start QuickPix – 4 sec., focus – 1 sec. and shoot.
I need a phone where I can shoot immediately. Just press the button, hold the button to focus and shoot. Where the longest part is getting the phone out of my pocket.
@Gruber directed me to Red Pop. It's really an add-on button to iPhone. And has a great video showing it's featurres here.
What do you need most when taking photo?