CasualRepartee writes "Comcast has been one of the most successful cable companies in the world; in many parts of the U.S., Comcast sits pretty on huge user bases that don't have many viable high-speed internet alternatives. However, poor customer service, slow speeds and generally poor business practices could make the once-great internet giant another extinct dinosaur, no ice age required. The fact of the matter is this: Comcast is no longer the biggest and the best. Cable is taking a distant back seat to Verizon's FiOS (fiber optic service), which delivers speeds up to 50 Mbps download and 10 Mbps upload speeds. Unlike Comcast, FiOS delivers the full range of bandwidth to each user, whereas Comcast users are forced to share bandwidth with other users on the same coaxial cable, causing speeds to fluctuate dramatically with usage."