I was going to post that the London Server at speedtest.net consistently shows 50-52 meg on a wired connection -non of their other servers seem up to the job, but my wireless speeds do fluctuate - sometimes droping below 30 meg (it's a hard life) but that's a problem with wireless.
Just checked my wireless and got
I know the mods don't like speed test websites but the London server of speedtest.net is a good place to start.