Geez - I thought those classes were to calm the parents' nerves!
DD had both her T's and A's removed when she was 4. Both were enlarged, and she had the sleep apnea thing going on too. DH and I met with the first ENT, who treated us like we were the 2 most incompetent people on the face of the earth. Let's face it, while DH and I both have college degrees, we'll be the first to admit that we don't know much about ENT stuff. This guy really talked down to us. Luckily, due to insurance issues, and the surgery needed to be done at the local Children's Hospital, since DD had other dental issues with appliances in her mouth (the dentist needed to be available etc), ENT1 did not have priveledges at Childrens, so we HAD (thank goodness) to have a different ENT - who was wonderful BTW.
So my advice...make sure you are comfortable with the ENT. And...once you are certain you are have the adenoids out - ask tons of questions about the anesthesiologist. Half of what goes on is related to the ENT, the other half is related to the anesthesiologist. Also - if it makes sense for you...request to be first in the morning the day of the surgery. Your child most likely will not be able to eat/drink anything after a certain time the evening before the procedure. I would NOT want to have to deal with my DD, at the age of 4 (or any other age for that matter) without her being able to eat for the day. I.e., while we did have to get up early, she was in the OR by 7:30 a.m. It would have devastated me if I would have had to listen to her crying for food any later, i.e. if her procedure wouldn't have been scheduled until say 11:00 am. Plus, the other advantage of being first...there usually haven't been any delays yet.
Good Luck!