I think there's definately something odd about the TBB speedtester (when testing Infinity connections) as many pings come out around 52ms - could be routing (I don't know) but it's good news that both of you get substantially lower pings.
The apparent evidence BT don't seem to throttle http or Usenet is also good news.
ADSL2+ with BE
DL Sync around 4.8Mbps
UL Sync 1088kbps
DG834GT with DGTeam firmware