People always act like the Wimbledon slowdown happened overnight. In 2002 it was "slow," yes, but I didn't see that in any of the years Federer won. 2002 was an anomaly at the time. Was it 90's fast from 2003 on? No, but it wasn't "slow" either. Lets not forget also that Nadal made Wimbledon finals in 2006 and 2007 when it was perhaps faster in the second week than it is these days. It's not a slight on him since he was obviously good enough to win those finals if he was able to make it that far.
Everybody in this era has benefited from the slowing of the courts including Federer, but he's benefited the least, not the most. Saying otherwise is just biased nonsense. The consistency in this era is partly a product of the general slowing of the courts. Of course that's true, but like I said, it baffles me when people act like this slowing happened overnight. It did not. I could tell visibly that Wimbledon was playing significantly slower in 2009 than it was in 2003 or 2004 for example.
Same thing with the AO and the USO. Just as an example, go watch the 05 USO final, and then watch Nadal-Djokovic from 2010 or 2011. I mean, they barely look like the same sport to be brutally honest, and the slowing at the AO might be the worst of all given how slow it is these days. Again look at Federer's matches against Nalbandian, Safin, and Agassi in 04 and 05. Then look at Nadal-Djokovic in 2012 or better yet Murray-Federer in 2010. Again, barely the same sport.