Hi katiekitten,
Certainly the US was not perfect, as I stated. Race based slavery, government corruption/favoritism, religious influence, and communalistic tradition all had a part in keeping the system from reaching its full potential. Just keep in mind however that, despite propaganda we are fed, capitalism did not invent slavery, exploitation, poverty and a number of other social ills blamed upon it. Communalism is the real source of the majority of social ills which its proponents want to blame on free market capitalism. If we study history it becomes clear that such ills all predate any periods of free market capitalism and are at their worse during periods which are firmly in the grips of a communalistic system.
I will freely admit I don't have all the data memorized to print out for you here. I read and study such things and grasp general ideas which I can remember and discuss. I know such data is available as I have seen it but can not immediantly provide it for you. If you are curious I strongly suggest you research it for yourself as I do not claim infalable knowledge. If I have time I may be able to put together some stats but I think most people would agree that Western countries that embraced capitalism are far better off than they were in 1200 AD and no stats are needed to see this.