i have noticed a big difference in file size. in the jpg saving option you can preview the file sizes for the diff levels. it might take a few moments for the new file size to appear.Wow, I have always saved at 12. Does saving at 10 really conserve that much space?
I upload to Shuttferfly and SmugMug and it's faster with smaller files.I always do 12. It's just habit & I have a big EHD, so I don't mind! lol