Actually that's a very common myth. The DSL line is not shared from your house to the CO, where a cable line is shared across a node, which falls in a geographical area we refer to as a 'neighborhood.' However, when your DSL line meets at the CO, and your neighbor's does as well, as well as his neighbor and their neighbors, where do you think it goes? Bingo! It's shared at the CO unlike cable which is shared in a node. Pick your poison, neither one can guarantee speed, but DSL's CO can control how much bandwidth you get based on how much you pay.