Due to the shared nature of cable modem technology, heavy peak usage and modulation schemes can heavily influence information transfer rates. As with any shared system, the number of users, and the services required, will vary with time. All rates are superior to 56K Modems, ISDN and the Television-based option. One criticism of cable networks is that as peak load increases the efficiency, from the consumer's viewpoint, will decrease. Immature technology without widespread availability.
Cable modems operate over a shared media and are subject to peak loads and increased noise.
Also, on that same note, since they are shared, it's possible for your neighbors to view the contents of your hard drive. New cabling is predominantly planned for residential areas leaving less populated and rural areas once again behind the times. Now, we can move to the business portion. I've spent the most time focusing on the net at home because that's an asset we can all relate to. I'm learning a great deal myself about the Internet at work.