In terms of bunch finishes I'd say Gallopins best chances of a high placing will lie in stage 2 (maybe), 3, 5, and 6. I could see him, and hope he does, get in a couple breakaways too. His best chance at a stage win I would say will be from breakaways.
Don't think he'll end up having to do work for Schleck too much. Unless Schleck has come into great form and ends up contending, which I think is unlikely. Radioshack should focus on putting riders like Gallopin in breaks and going for stage wins that way IMO.
So, how long before the French start hyping Tony as the next French Tour winner? Really impressive today, though I doubt he can continue this all the way to Paris but still a great sight seeing Contador etc drop before Gallopin.
Tomorrow's stage should suit him well if the break doesn't stick.