After inserting data of 40 riders it seems (time first TT x 1,4) is average.
Most GC men will like this TT so (time first TT x 1,35) is likely for guys like Contador, Kreuziger, and so on.
Hivert and Kittel did x 1,31 = best so far.
For the GC contenders:
Froome x 1,3 ==> 47:25; x 1,35 49:20; x 1,4 51:12, so 49-49:30 is to be expected. 51 would be very bad.
Contador and Mollema: 50ish would be great based on the first TT, 52 not so much.
Ten Dam will do 52-53 based on form.
Quintana: 51:30? Maybe a little faster, he might be capable of doing x 1,27 or so.