And to prior posts on contention ratios and capping. Clear information on what you actually get for your money should be mandated. The telecoms industry has proven itself, time and again, to be unable to self-police.
and actually I wonder if requiring publication of statistics of what is actually being achieved for each product on the ISPs network might be useful. Maximum, minimum and mean speed, rather than the theoretical upto claim...
Now find me a hosting facility in London which can provide the infrastructure to allow you to fully populate a rack with these thing. The power and cooling density is just prohibitive.