No I am not on HDPI display, but the difference in the image quality is noticeable. The main image and max zoomed out image should be the same but clearly there is difference in the quality. Well noticeable also on the last image here http://www.whistles.com/women/clothing/coats-jackets/double-faced-marl-jacket-20302.html?dwvar_double-faced-marl-jacket-20302_color=Navy#prefn1=subCategory&prefv1=Coats+___and___+Jackets&start=1
. Zoom max out and then close the zoom. You will see there is a difference in the quality. I've seen difference getting bigger for some images.