Depends on the shoot and client's requirements! Personally speaking, I'd be delighted to shoot some jobs and hand over the RAW files to the client so that someone else can sit in front of the computer for hours and carry out all the post processing! Unfortunately this doesn't happen as I've yet to find a client prepared to pay me first to take the images, and then someone else to post process them, so I have to post process the images and the client naturally enough gets final images, but not the RAW files. ScubaDiva, you are in a real minority in wanting the RAW files and as its outside the normal way images are supplied, you'll need to find a photographer actually prepared to supply the RAW files; anticipate that you'll be charged more in lieu of 'secondary' sales by the photographer (print reorders, etc.) and to compensate for any potential 'quality' issues with the final images. By the way, very, very few film photographers ever handed over the negatives either - this is nothing new.
Thinking about it I don't want to sit and post-process the photos - your absolutely right this is part of what I will pay for. I guess I just focused on the raw thing cos I'm used to chatting about that format with u/w photographers.
More the issue is how many of the photos actually shot do I get. So say 200 photos got taken and a selection were post-processed and then the client ends up with 50 that they choose from the proofs. What about getting the rest of the unprocessed ones? It only takes copying over and they are the ones that didn't have time spent on them. I guess the argument there would be that a professional photographer wouldn't want to hand over 'all' as some may not have turned out well and so they wouldn't want 'bad' photos by them being seen.