They use the wiggle room provided by saying service is "up to" some magical speed. I have tried more than once to have cable companies express to me the MINIMUM GUARANTEED speed. It's like pulling teeth from chickens.

One Telco CSR stopped messing around when I told her she could have all the money in my pocket, and I have, at any given time, UP TO five million dollars in there. She should not be discouraged, nor think I'm lying, because I actually had twelve bucks, since that is included in "up to five million dollars."

She put me on hold and came back telling me they'd provide at least 750kbits. That made the decision easier!