Typical Customer Profiles

Has anyone published something like "Neilson Ratings" for Internet use? Something that would show how much time a customer spends using their Internet connection, how much they download and speed they commonly get/expect? I would be interested in breaking these questions out for a dialup user, cable modem user, DSL user and then home use vs. small business use. Pointers to some or all of this information would be appreciated. ~Curt