Reading through the posts, the hub is a DOCSIS2 device and won't be capable of the 3mb upstream (anyone know what it IS capable of?) and DOCSIS2 downstream is up to 27mbps (?). Possibly then, those of us with the hub will end up keeping the equipment we have as it's a free upgrade anyway and will likely be advertised as 'up to'.
I hope all that made sense!
As a side note, I remember when we got a free upgrade to 10mb from something or other (maybe 4?) and were told we needed a SACM as our STB's wouldn't do it. But they did.