Ah ok. I know that they mooted changing the balls or the rackets or possibly making it so you couldn't jump when serving. Didn't know that they actually implemented any of those things. Definitely makes the game better.
At Wimbledon, where the surface had accelerated play to the point where it became tedious, more and fuzzier felt was added to the balls, slowing them up a bit.
I think they may also have changed the grass seeds used. Not 100% on that bit.
15 years or so ago the average 'rally' was 2.1 shots long. Today is something like 5.