Well you have to understand that those statistical analyses have an inherent flaw. It's only showing tv table matches, which are going to err to the side of the better performers. So yeah, there might not be a difference in the break between those players who are playing better and are more likely to be on the tv tables and to get farther in the tournament. but that doesn't mean that the players who aren't playing as well aren't having more difficulty than they normally would be with other breaks.
Now don't get me wrong I'm not arguing that in the long run, it's different. Honestly, I doubt that it is, but any statistical analysis needs to include all of the matches to be truly reliable. The tv tables are inherently going to have better performing players on average.