We have adopted 3 children as newborns. They are all VERY attached to us. There is absolutely no attachment disorders at all! Our son, who will be 1 in a couple of weeks is EXTREMELY attached to me! LOL Can't even pee without him coming with me. LOL
From the second i could I held them as often as possible. When I fed them I held them close, almost as if breastfeeding. I held them so they could hear my heart when they weren't eating & we were just cuddling. I sang (still do) their own special song to them whenever I held them. I touched them all the time, massaged them. While feeding I gently rubbed their face, hands, etc.
Some say that ALL adopted children have attachment problems. They say when they are in the Uterus they hear Moms voice & Moms heart. When they are adopted & no longer hear that safe familiar voice, that they have a hard time. MAYBE...but I know that with all our children they bonded very quickly. Never noticed any attachment problems. I have 2 bio children also, it was exactly the same.
The most important thing is to hold your baby close as much as possible. If you aren't able to bring your baby home from the hospital, leave a stuffed animal or T-shirt of yours that has your scent on it. I had a stuffed animal that I slept with for a few days I kept in the babys hospital crib.
Don't listen to people who have no idea what they are talking about. Those who have never adopted don't get it.

Don't stress about it. Just love your baby the best you can!!!
Deb