Faster image capture is better in an "Apple" way. The speed with which I can take pictures with my 4S makes it far superior for e.g. taking pictures of kids, who tend to not wait for your camera app to get ready.
And yet, you will still miss shots because the camera was slow. 40% improvement here is a big deal.
And yet, you will still miss shots because the camera was slow. 40% improvement here is a big deal.