If your cabinet has been enabled for FTTC but the exchange is still not WBC enabled, (WBC is what as knows shows for BT Wholesale ADSL2+), then it's quite likely WBC will not be added to the exchange. As per my previous post.
As FTTC requires WBC, the fibre for your cabinet must be coming from a different exchange.
Given your high sync on ADSL, ADSL2+ would give a decent increase. Do you have your attenuation, exact sync (probably 7616 or 8128), plus the noise margin/SNRM immediately after a re-sync? If so, feed those into this calculator
If you tell us that result, and can also find your cabinet and try to estimate your copper distance from the FTTC one near it, passing through the phone cab, then we should be able to give you a closer FTTC estimate than the one you are being told.
Edit - Just realised you gave an ADSL2 estimate. I assume you meant ADSL2+, which is what is normally supplied in this country. The two are not the same. Where did you get that estimate from please?
The chances of your FTTC being below that are negligible.
Edit 2: Re MrSaffron's very valid post, this is why I'm asking you for all this extra detail, to confirm my opinion about the estimate.
The indispensable man or woman passes from the scene, and what happens next is more or less the same thing as was happening before.
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Edited by RobertoS (Wed 04-Nov-15 10:10:31)