I agree with ARod and Ivo. I'm biased as a Fed fan, but I feel that Wimbledon now produces the best tennis to watch. Baseline rallies on the slow grass, sure, but there is a sense of urgency to them. Pushing doesn't work; a player must have a purpose in the rally and be looking to end the point before the other guy does. At the highest levels, that is how tennis should be, in my opinion.
Wars of attrition, as we saw in the Miami final, don't test, or reward, all the skills that these guys have. Fitness and consistency, as well as doggedness and tenacity, are what win trophies on slow hardcourts. These are things champions must have, but I would rather see lions pouncing and eagles swooping than dogs running with their tongues hanging out.