My stats were similar to yours (slightly better in fact) when I had FTTC installed in 2011.
I was probably the first to be connected, via PlusNet, as BT continued to state for a good few months that it wasn't actually available.
These are my current stats (gradually degraded by increased crosstalk) on approx. 1100m line length:-
xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 5115 Kbps, Downstream rate = 20600 Kbps
Bearer: 0, Upstream rate = 4999 Kbps, Downstream rate = 21912 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1200)
DS: (33,859) (1216,1734)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 5115 kbps 20600 kbps
Actual Aggregate Tx Power: 6.9 dBm 12.6 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 8.2 54.4 N/A N/A N/A 21.9 66.8 N/A
Signal Attenuation(dB): 8.2 53.8 N/A N/A N/A 30.9 66.6 N/A
SNR Margin(dB): 5.9 6.1 N/A N/A N/A 5.6 5.6 N/A
TX Power(dBm): 0.1 5.9 N/A N/A N/A 11.6 6.1 N/A