No. Those figures are for ADSL, FTTC uses VDSL.
I can assure you that the 7800N handles profiles of ~39Mbps down and 10Mbps up without even working up a sweat 
Thanks, that's a relief.
I've another question but not quite VDSL-related regarding the 7800N:
The integrated Annex M standard supports ADSL2/2+ for higher uploads by doubling the upload data rate
Now from
BT's DSL checker site I read the following about my local exchange:
Our test also indicates that your line currently supports an estimated ADSL2+ broadband line speed of 6Mbps; typically the line speed would range between 3.5Mbps and 8.5Mbps. Our test also indicates that your line could support an estimated ADSL 2+ Annex-M broadband upstream line speed of 1Mbps and downstream line speed of 6Mbps; typically the downstream speed would range between 3.5Mbps and 8.5Mbps.
With my Thomson ADSL router, I get around 6Mbps d/l and 384Kbps u/l, but given the above info about Annex-M, could I achieve 1Mbps upload simply by switching to a 7800N?