We do this with our MICU patients. We don't really have a script or even certain information we give...usually it's a synopsis of the patient's history and current situation, sort of like how many nurses give report.."So and so is a blank year old gentleman who came in through the ED with abdominal pain and black stools x 3days blah blah blah"....
Getting the negatives out of the way first...it's one more thing to do...they always seem to show up when you are busy (when aren't we busy though?LOL). Also, oftentimes you pick up a patient at 0730 with a complicated backround, rounds are at 1030, you haven't really had time to learn as much as you'd like, and nursing ends up looking ill-informed.
As to the residents' roles, usually the "presentation" leads to a question from someone and the whole thing turns into a discussion of something or another regarding the patient, and maybe a mini-lecture by the attending. Our rounds are multi-disciplinary with the attending, fellows, residents, med students, PT, RT, RD, Pharm, and the charge nurse all in attendance. So we're presenting to a rather large group.
On a positive note, some really good discussions come out of it. Creative solutions come from all different angles...someone will suggest that something is an issue and the PT or the RD will have a suggestion. (Nursing is expected to stay, listen, and have input after the initial presentation too ). It's kind of great when everyone puts thier heads together and solutions are reached - how to get a patient oob, how to most effectively time meds to work with nutrition and PT or a spontaneous breathing trial, etc etc. So I guess overall I like them even if they are sort of a disruption a lot of the time.