Good point. I toned down the recommendations a bit, and added a link to an article by PPK explaining how to avoid delivering all your high-res images to low-res

Good point. I toned down the recommendations a bit, and added a link to an article by PPK explaining how to avoid delivering all your high-res images to low-res devices. (A lot has been written about this lately, and I didn't want want to repeat too much of what's already been said.)