It seems a challenge to not blow your engine on the first 3.5% climb. Since it's so 'shallow' it perhaps feels you can go full throttle, but then you pay the consequences in the second climb.
In case the end time is 1:35, the avg speed will have been 38.274
In case the final time is 1:30, the avg speed will have been 40.4
I don't know about today, because it's long, technical, it's hilly and windy as well as long steep an flat straight. It seems like the most complete cyclist will win, or someone who knows how to minimize his weak points, and split up the stage in multiple mini TT sections, while being alert not to blow up the engine on the sections you favour.