When I did a speed test on my BT line the maximum I was able to get was 1 Mb. I asked Tiscali if I could achieve more than this and was put on Tiscali max which gave me 2 Mb. How was it achievable by getting a quart into a pint pot?
I was under the impression that Tiscali had installed some extra equipment in the BT exchange to get the extra speed but I could be wrong. I also thought they had used a software package which strips out redundant parts of your data (similar to Onspeed) but would that improve efficiency by 100%?
the services simply act as a proxy server with compression.
(it's often quicker to transmit 1 densely packed file than lots of little jobbies) + some other tricks to optimise transmission rates ... but not speeds.
more likely they shifted you to a less populated mtu or even more likely shifted the transmission load to the value it should have been in the first place.