Just entered it (9am start)- missed last year due to 'stuff'. Will be coming up from Cornwall with friend as we did in 2010, 11 & 12.
I am considering using my touring bike with 35mm tyres and excellent front Shimano mini v-brake, as I always feel a bit nervous descending those muddy twisty lanes with 26mm slicks and DP brakes. Also the tourer has a 19" bottom gear- but it does weigh about 4kg more than my Equilibrium...
I might have the original GPX for 2011- will have a look later.
EDIT: found the 2011 DD GPX, at a brief glance I cannot see a difference:
http://ridewithgps.com/trips/3504679 (apart from the return to Bovey Tracey after the finish being left off this one)
EDIT 2: spotted it, as said new route, if correct, does not go to Poundsgate as per 2011, but up to Buckland