said by Crookshanks:
.... which is a very great deal for an effectively dedicated connection, presuming they have enough back-haul to support it.
I would stop short of calling this a dedicated connection, and it should not be compared to your employers dedicated business connection.
My understanding of terminology is that a "dedicated connection" allocates you a CDR (committed data rate) directly to the providers POP (point of presence), where the data is off-loaded to other providers.
I don't believe Comcast is providing a guarantee or CDR under this residential grade service. While speeds may reach the stated maximum, bandwidth is still shared between users out of the same CMTS/head-end