Whilst it may be relatively logical, the fact remains that there has been no further speed increases now for many days.
I wonder if we are all being too optimistic knowing the likely line route is around 800 m probably mainly on 40 / 50 year old cables ?
DLM doesn't care much about distance or age. It does care about quality ... but DSL is meant to adapt any foibles of distance and age to maintain quality, so DLM only cares about the end result after such adaptations have taken place.
What I have seen of the stats, since the last change, suggests that there is no reason for DLM's concern. But I stress that this is based on a limited view.
Unfortunately, the very hardest aspect to figure out about DLM is in its choice to de-intervene. Especially since the introduction of G.INP, and equally since the legal setback relating to the Assia patent and the subsequent settlement. DLM's behaviour has most certainly changed by much more than
just the introduction of G.INP ... but that introduction also makes DLM's other behaviour much rarer. Figuring DLM out now has to work on the slimmest of evidence.
On the matter of age, though...
I have no idea about the age of my current line, but it is fed from an old bell-shaped DP, into a building that is pre-WWI. The age and "gentility" of this area suggests that telephone usage perhaps started early here, and there looks to be significant use of 0.4mm copper. Yet in this environment, with an apparently noisy line, I have had zero errors in the last 3 months.
However, my very first FTTC line, with copper laid in the mid nineties, triggered DLM at the first opportunity, after incurring packet loss of around 4%.
I don't find age to be instantaneous indicator of problems. Not for copper, at any rate.
