OK, so after having given the line chance to settle, the current stats are as follows, using the HG633:-
Broadband Information
DSL synchronization status: Up
Connection status: Showtime
Upstream line rate (kbit/s): 17051
Downstream line rate (kbit/s): 54005
Maximum upstream rate (kbit/s): 16979
Maximum downstream rate (kbit/s): 75192
Upstream noise safety coefficient (dB): 6
Downstream noise safety coefficient (dB): 7
Upstream interleave depth: 1
Downstream interleave depth: 2714
Line standard: VDSL2
Upstream line attenuation (dB): 0.1 (must be a fw bug, surely? the HG635 always reported it around 25dB)
Downstream line attenuation (dB): 13.1
Upstream output power (dBm): 6.8
Downstream output power (dBm): 12.2
Channel type: Interleaved
DSL up-time: 16 days 1 hour 20 minutes 40 seconds
considering the interleaving (which was always reported as fastpath on the HG635, with interleaving depths of 0 both up & down) is it worth asking for a line re-train, or is it unlikely to produce better syncs than currently? I don't mind spending half an hour on the phone to TT if it may be worth it..... any opinions welcomed