said by lilstone87:Well im from Portsmouth myself, and i can tell you first hand i had a Arris modem, and a SB5100 modem and both would cap at about 2mb with powerboost.
Now im running the newer SB6120 a Docsis 3.0 modem, and im getting these results.

The above speedtest was just taken.
EDIT: this was another one taken from another server just now also.

Btw i was wondering about the same thing not too long ago, and i called and asked about what my speeds were exactly, and i was told my QOS was 23,000=23mb down and 3200=3.2mb up, and this is with premier internet service also.
Thanks for the info. Glad to know I'm not going senile. It would suck to invest money in a new modem for something that the current modem should be capable of though.