Well, somewhat.....
My access is is actually around 8mbits 24/7.
Speedbooster is supposed to raise the cieling to 16mbits.
Here is a link.
http://www.comcast.com/powerboost/
My guess its packetshaping and new switching software on the cable routers[i am using the term correctly, cable routers are $12000 a piece...not to be confused with a cable modem + broadband router]
The sad thing is, the bandwidth backyard supports so much more. The equipment is shiny and new.....
I uncapped my modem to test. Best benchmark was 150mbits down and 100 mbits up. Stable benchmark was was ~125mbits down and 75 mbits up.
This is mbits, not kbits....
This is docsis 2.0
DSl is about half the benchmarks, from a friend that has SBC Yahoo.
We only do this intermittenly and for short periods of time.
In the US, it is illegal to uncap a modem....some fcc law of stealing bandwidth....and not being liscensed to take in that much bandwidth....but the system supports it, and there was no difference to the other customers....I checked against my capped cable friends....
Its a serious crime when you uncap your modem for some reason....if your caught, the feds come and take all your computer hardware....
Comcast confirmed it a few months ago when they announced they will be uncapping their docsis 2.0 service when transitioning to docsis 3.0.
Were not behind asia, FIOS is being deployed in major cities and is only $42.95 versus $199 in asia[korea & japan] and our uncapped version still faster....they are just illegal in the US.....
For some reason you need an fcc bandwidth liscense.
There is a real problem with HDTV over local air if your read into it....
Unfortunately, i live in the burbs and have to wait tirelessly for any new tech...
Its pretty sad when you have friends that have 10 times the bandwidth for the same price.....and they only live 20 minutes from you....
Its just the "MAN" trying to keep you down.
In japan, they are already running uncapped internet since their ISPs are owned by the japanese govt and they dont respect the FCC.
Their DSL is still slower than american, since ours can pull 75kbits and their topping out at 45kbits....and thats recently with yahoo bb....
Im not sure if the UK has a similar "MAN" keeping the internet down....best way to check is to reflash your modem and run a speed test....
Another funny story while im babbling off topic.....
My college friend lives in New Jersey, and he barely get 1 mbit cause hes in a rural area.... He uncapped for and tested at a max of 45 mbits down stream....