Fed is still great when he can attack freely, and he could do that today. But like BroTree said, this means very little going forward because Janko can't force Roger to defend like for example Delpo can. And it is in defense (or rather, the transition from defense to attack) that Roger has declined the most.
I agree, but Federer seemed better than 2 weeks ago against worst players than Tipsy. IMO we need to wait until the match against Delpo.