Why would adopted children be any different? 
Kaldin, as the saying goes, we have to walk in another's shoes to know how it feels to be them. Can you explain to me how it feels to NOT be adopted?
I think it's possible that ALL adopted children feel special. However, "special" is a huge spectrum ranging from adored at one end to being 'necessary' at the other and some overlapping around the middle. There are those would be parents who simply long for a child out of the basic need to be parents and will allow their child to develop in it's own way. These, imo, regardless of their income, probably make the best parents. Then there are the 'would be's' who believe a child will hold together a shaky relationship!!!! There are also those who want children for dynastic purposes and with scant regard for the child's wishes, encourage, guide, lead, push, coerce, force, blackmail them down the path they would have expected of their biological child. Whilst I'm not entirely suggesting such is deliberate, I AM suggesting there to be an element of entitlement, an expectation of gratitude, of pay-back. As few would be honest enough to voice such feelings out loud, currency, wrapped up to look like unfailing generosity, is frequently the carrot. Unless the child in question has it's own innate leanings towards the specified lifestyle, OR is prepared to subjugate it's own preferences to the wishes of it's parents, this can be a dilemma. Certainly, most won't resort to murder to gain, what they MAY feel they've earned -I believe a sense of entitlement has been leveled at Jeremy- but MANY may wish they were anywhere other than feeling trapped by duty.