While you cannot be certain, and particularly as the 2015 goal has a higher 2017 and higher 2018 target now, given the postcode and a map its pretty easy to take an educated guess.
Or put cruder - if you are the only property for a mile in any road direction, then unlikely to see anything from the superfast side of things.
If its a cluster of 10-20 properties then if target by the county is in the 95% or above then a 50/50 chance.
If its a cluster of 100 properties and target is 90% then probably 50/50.
All depends on the ambition and drive of the council, the BT element is relatively consistent and can be partially predicted.