I used to shoot weddings. I generally used a mix of RAW and JPG, RAW for important formals and ceremony shots where a possibility of minor tweaking might be needed, JPG's for most everything else less important to conserve memory cards and speed workflow. A client that had demands on how I shoot before getting booked, I would generally blowoff and say my day was already booked. If he's a problem before booking the wedding, it usually meant for problems after. It's not worth taking on that kind of client. If I did hand over files to a client, they were post processed JPG's that represented a final complete product.
Also remember the photographer holds the legal copyright to images he shot. If they don't sign off a copyright release to you, any prints you might make would be an infringement of the photog's copyright. If you should end up getting files of any kind, make sure that a release comes with them.