I use RAW all the time because when I made mistakes, quite often, I can correct them if they are RAW files. I can go as much as +/- 2 stops without showing any sign that the photo had been corected in the pc. I would like to show you such pictures but I do not know how to post my pictures here.
If the pictures are perfect in exposures etc, then you will not see the differences between RAW and jpeg. But how often do you make perfect exposure?
Pictures of small insect like this one.
http://www.birdforum.net/pp_gallery/...cat/500/page/1 is very hard to set the exposure right on the spot. This Fruit Fly is 6 mm long. Even with spot metering I had to correct by 0.5 stop. I added sharpening. With Nikon Capture4 if you use jpeg file the software will not allow you to modify exposure and sharpening etc.