I have been now been running on the newly installed BT Infinity Broadband connection since early December.
As can be seen from the graph I have seen a steady climb up towards 18MB download whilst the upload has been pretty constant since around the 5th December.
I have not noticed a great deal of fall off in the evening when more people are online.
Two things I have noticed (which is an obvious result of the upgrade) is a better ‘picture’ when watching anything on BBC iPlayer on our (network connected) HDTV and the ability to run more data over the ‘link’. It arrived at the right time as I have had to move some quite large image data files around and the faster upload speed certainly helped.
The router (which now has a separate external modem) has reset it self a few times, I assume for updates? However it is not affected the speed.
It will be interesting to see if the speed climbs any higher in January 2011 or as BT add more users to the fibre loop, if it stays the same.