I was on the 80/20 Infinity2 package and would get 80/10 when wired via their homehub3 and about 40/10 when over wifi.
I've moved to sky on the 40/10 package (actually meant to sign up for the 80meg package) and this router lets you see the stats. I'm connected at full speed.
Line Rate - Upstream (Kbps):9995
Line Rate - Downstream (Kbps):39998
However, this router is absolute muck. Wired I'll get the full speed, but on a surface pro2 sat next to the hub am getting 20meg. Really disappointed with the hub, it feels sluggish compared to the BT HH3 which I wasnt overly impressed with.