Agreed. But would you say that progressive jpegs don't offer a visual advantage in this case? Imagine if a photo has a caption below it: baseline starts renderi

Agreed. But would you say that progressive jpegs don't offer a visual advantage in this case? Imagine if a photo has a caption below it: baseline starts rendering far away from the caption, but with progressive we'll get the caption in the correct place without a big gap between the caption and where the photo is rendering. In the case of baseline, the photo will draw to "meet" the caption.