Progressive JPEGs are actually a worse experience on browsers that don't render them progressively, like Safari (including iOS). This is why many major sites,

Progressive JPEGs are actually a worse experience on browsers that don't render them progressively, like Safari (including iOS). This is why many major sites, such as Flickr, don't use progressive JPEGs (last time I checked, which was a few years ago). See: http://calendar.perfplanet.com/2012/progressive-jpegs-a-new-best-practice/ http://calendar.perfplanet.com/2012/progressive-jpegs-a-new-...