I have just upgraded this evening, I have the terayon TJ210 modem. I was on 3mbit and I used to get 300k/sec (ish) download speed. Since 'upgrading' this evening, I now get a superb 30k/sec to this same website and nowhere near even 3mbit speeds maximum let alone 10mbit!
I would advise people NOT to upgrade! when I was enquiring about the upgrade, CS told me that I cannot moan about the speed because its still in testing and not official, they also told me that they will not be contacting me about the speed upgrade as I have already done it and that performance all depends on your modem and location. I can only enquire about poor performance once it has officially gone live.
not happy one bit so far I have to say!