Post 21CN WBC Experiences - Long Line?

Hi
My rural exchange is due for 21CN WBC upgrade this June
I was wondering if anyone has had a good experience following this type of upgrade -  specifically on a long line
The 'experts' claim there will be no positive impact for low speed long line sufferers but interested to hear from anyone with 'real life' experience of this
My stats:
Sync around 1.3meg
D/Load around 900k
U/Load around 280k
snr down 6db
Line Att 74db
Router/modem BT 2Wire 2700
Faceplate fitted

big difference from 55 to 74 though  a 1.3mb connection with 74 attenuation is good
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