Well, it would appear you can add me to the list of people who've had G.INP removed from US despite my modem/router supporting it (Billion 8800NL). Prior to last night's re-sync, my US was 18+mbps with a SNMR around 3dB with only a couple of US ES a week, now US synced 5mbps less. My US Interleaver Depth has changed from 4 to 1 and INP from 45 to 0.
On top of that, my DS has been banded at 60mbs with a SNRM 9dB for 3+ months despite averaging around 1ES a day with an attainable rate of around 70mbps being reported by my Billion. It gets even worse, as my BT DS profile is around 92% of my sync speed, not 97% (again, has been for months).
Honestly, if there was a credible alternative to BT in my area ...