No, as i said yesterday the safest bet is that Froome will be held at bay. He could even lose some seconds and acting afterwards that he felt the effects from earlier. Everyone will point out he is clean and everything is cool then.
I think it is Portes time to shine.
Edit: But one have to feel poor Froome here. I mean, one day he woke up with superpowers and arent allowed to show it, full *** style.
The GC contenders NEED to put some time into Froome on the Ventoux. If they soft pedal or he takes time it's over. Yes the third week is hard. But if Froome and Sky get a controlled ride over Ventoux. It sets them up going into week 3 somewhat fresh. If you can say that in a GT? And IMHO Porte, Froome & Sky need to get a good punch in the mouth. By doing so the other contenders have hope going forward. My .02$
The Dawg is going to get busted at some point anyway, might as well have a bit of fun before then and do something that makes Ax-3-Domaines look ordinary. It's what I would do if I were in his shoes.