the habit to take shortcuts is written in the books of fast action photyography (for a reason), but over the years of digital (not so many, so experience doesn't count much in there) I did start using a D100 in jpeg when I was still shooting a bronica with ... film. (by then, 4 years ago, I didn't even know the real difference bewteen raw and jpeg)
let's face it: digital is just few years old.. what experience has to do with the choice of the format of preference?
We are all young in this..
I am open to suggestions, and this place is the best there is, suggestions from amateurs as well: but what I know I want to share it as well.. after all saving space on the card doesn't pay back in the long run, so it is also my duty to explain my experience and vision.
An example, real life thing happened to me no more than 8 months ago: I was shooting a parade (by mistake because I had a cancelation and I didn't know what to do that afternoon): I had just one card in the camera and I started shooting raw (as usual): after a while I was thinking about switching to jpeg because I was about to fill the card. I didn't and guess what? 12 shots were selected to be printed on panels 12x4 (ft) for few hundred stores... you know what? You really never know when you may need the maximum quality acheavable by your camera.
This example is real, but anyone is free to choose the best setting for his own photography of course. Still, it's my duty to tell my experience.
From the tone of your answer I see that my reply has been misunderstood, like a form of arrogance on my part : it's not, honest.