Most U.S. broadband customers think they have a good thing going.As long as they can surf news sites and download their favorite music and games at 1-3 megabits per second, they feel as though they have entered digital Nirvana.Compared to the old days of holding one's breath waiting for a dial-up connection, and then praying an outside call would not break it, broadband really has redefined the way people surf the Internet. It is always on, always fast and always reliable.