sqad, I know a bit about this....in the Uk people who need hip replacements get referred into the waiting list while they still have things which make them unfit for surgery at that time eg uncontrolled blood pressure issues, also the assessment clinic can offer advice on how to manage while waiting and tell people what they will need to do post op in terms of exercise and precautions. Some people even get referred for hip replacement when its completely inappropriate for various reasons and these people can be offered the treatment that will help them. i agree, if GP's did better referrals, then such assessment clinics wouldn't be needed!
sandy, you should be given printed information, but its as well to take the wherewithall to make notes. if your friend isn't told, ask for post op do's and don'ts, at what point will your friend be discharged and what post op care arrangements are including rehab and get a contact number (24/7 if poss) in case anything which should happen doesn't or anything which shouldn't happen does.