Well, I've always wanted to adopt since I was a child, myself! I never had a "clear" vision as to where the baby would originate from, though.
I pondered many options: Liberia, Ethiopia, China, India, Pakistan, Guatamela, etc.
And I still would do any of the above. However, as it happened, the agency I chose to do an African adoption with was closed (temporarily). They advised me to stick with my domestic agency and see what happened.
Well...what happened was I had 2 hours notice of an available newborn. So, yes, that is the advantage of U.S. adoption - a fresh baby.
However, it is not uncommon for babies in Africa and Guatemala to be 4 months old upon coming home. Babies in Guat get VERY good one on one care by a foster care provider. Babies and kids from Africa (I am told have little to no attachment disorders). They are very well loved, but life is hard in Africa. Many of those African babies are orphaned due to aids or relinquished due to NO FOOD. (Parents feel that they should place baby or child in an orphange to ensure some food for their babies. Very sad).
African adoption are very affordable. Guatemalan seems higher ime. I forget how much China and India are. Higher than Africa, I know that...
In terms of bonding...well, the love is the same for me and for many others I have asked.

It really is. I love my birthed boy as much as the baby who was gifted to me by adoption.
I hope I answered your questions. I have to change a dirty diaper, so I must go!
Anyhow, what country are you considering? Good for you for considering adoption. It is a wonderful experience!