America holds the watered down version of Hindu weddings because there are fewer weddings out in the open here than there are in India. The bride's family usually buys all the furniture that the couple will need. In India, weddings are much more family oriented. When a woman gets married, she not only lives with her husband, but also with her husband's family. In America, though, there aren't many joint-families.
Couples usually live in their own homes, separate from their parents.
Another difference is that in India, there are many priests to choose from. If you don't like the practices of a certain priest, you can always find one who fits your needs. In America, though, there are many places that only have one or two priests, if even that. This gives Hindus in America a more limited choice as to how they want their wedding to be performed. Some festivities that take place in Hindu weddings in India, such as the 'baraat,' or procession of the groom to the wedding, would be limited.