The only time I'd opt for JPEG a over RAW, was when I'd be shooting all day and needed to maximize my card storage and battery life.
JPEGs write faster to the card, which saves battery life. And, it's obvious they take less space, so I could shove a lot more images into a few chips.
Of course, shooting JPEGs means you don't have the leeway available for post-processing, so it's more important to get the white-balance and exposures right in-camera. Trying to dig an important shot out of a bad exposure or color-tinted image because the sun went behind clouds, or stadium/arena lights are old, is a real pain.
If I needed to get files to a customer quickly, I'd do RAW+JPEG and send them the JPEG files and wait for their request for specific images, then process the RAW if necessary and send those. Of course, that burns batteries and chips, but gives the most flexibility.