For the posters above, who haven't experienced the wonderful technology of emergency braking.... on the motorway the GTD has given a small 2 car symbol at the bottom of display to say "too close".
Once or twice it gave the "large red" warning sign telling me to brake.
The GT never experienced either of these warnings.
Both cars have applied emergency braking (scary, ABS moment) on the occasions mentioned above. (this system has been tested and shown on TV shows such as Top Gear)
My fear is that some day there will be a car behind which rear ends my vehicle because I have unintentionally emergency braked.
My point is, it happens very rarely, once every several thousand mile in the GT, but about every 500 miles in the GTD.
For the record, it's a 2013 GT and a 2014 GTD in case it's a software change, but I think it's to do with different fronts on the different models.