[sincerely]

Our little girl did this, the day she came, said we were her new mommy & daddy and she was never leaving. We had no idea what the situation was and how long she might be with us (now going on 3 yrs). We've since had her evaluated and she's been dx with RAD.

there's a lot of info on RAd out there and it is more of a spectrum thing than a cut and dry thing. There are books that have helped me on attachement & adoption - and from what I've read, attachment should be a concern in any adoption and something you should read about.

The other end of RAd is a child that doesn't engage with ppl at all and I would think that might be harder to deal with.
Thing is, I don't think it's something that should be like "oh no, I think there's going to be some issues", it's not like that. Your friends want to be parents and are excited about it and the kids need parents and obviously are excited about that too. These are kids that got their baggage early, and your friends and these kids will now be on a journey together. They will have rough spots of learning and growing together, but it will be so rewarding and worth it in every way.
I agree w/ another poster, maybe a book on attachment & adoption and maybe some parenting cd's or something. For us, it's been more about learning creative methods of behavior modification.

Overall, be positive and encouraging with your friends, they are on a rewarding and challenging journey! And about to experience a blessing and joy beyond their imagination.