Bah, they don't know shit about music games anyway. The timing windows in the GH/RB games is SO much looser than most other music games anyway.
I mean, IIDX has that insane timing, and the fact that it's damn hard to AAA most songs for it. Stepmania/DDR is hard to AAA too much stuff well, and for those players who get that good, there's always something harder. So you can AAA blur with your eyes closed? Try blur speedy mix, or one of the joke songs that are harder than blur.
But GH, well, I think some people have gotten good enough to reach max scores possible on a number of those songs. Sure, you can make your own charts, but there isn't nearly as much community for that as there is for stepmania etc.