I will have to go along with three of my favorite legends of all time on this. If he is serving as well as he did in the French and rallying well with Nadal and Djoko as well, it's hard for me to think the grass would make things fall outside of Roger's favor. Anyone feels differently, feel free to post.
Just saw the last game Tsonga served out. Fed really couldn't return effectively. Tsonga put extra on the second serve when he missed his firsts. Fed just way too passive.