I was surprised that the degradation was fairly unnoticeable through 75 percent compression and that the largest savings occurs between compression values of 1 and 10. Beyond 10, the file size savings is really minimal comparitively.

I believe that compressing a jpg to a value of 10 (would that be percent?) is best choice for balancing file size and image degradation when using jpg compression unless, of course, you're putting many images on one page.