I guess that I have never seen a jpg file that did not obliterate the fine detail,
in the process of compression. Compare 50 x 50 pixel sections, at a size where
you can see the individual pixels, of an original pixel-data file, with the compressed
jpg pixels. Stuff that was there is gone, stuff the wasn't there appears (artifacts).
Maybe the jpgs from the P2V camera are extraordinarily good?
The ones that I see posted here (usually much reduced resolution)
appear to have many artifacts, much like an impressionist painting.