I've gleaned a graph from BT that purports to show the change to error rates with the introduction of G.INP.
The graph came from a different presentation, so it is blurry, and doesn't come with proper labels. But it gives an impression.
I *suspect* that the horizontal axis show the number of ES's per 24 hours. If true, then my reading is that, pre-G.INP, 90% of lines were achieving less than 500 ES's per day. Post-G.INP, 90% of lines are achieving 20 ES's per day or less.