Thats just silly, I know a lot of guys put too much faith in the "graphs", but IMO them guys are just in the wrong hobby, you should have picked another hobby like model air plane and village building, where you can live in your pretend world and listen to speakers with your eyes instead of your ears...
For the measurement clowns {you know who you are}

... If it sounds good to the person listening than you have no business saying sell that speaker or them are not good... I can afford any speaker in the world but I buy the ones I like that make sense and sound good to me for the cost, I don't care that some jerk off with a free pc program and $50 microphone prints out a wavy graph that says my speakers don't sound good... Get a life and go listen to some music with the ears god gave you {or you evolved to have, which ever you believe} not a laptop...
I have heard a few zu products, and they aren't terrible, they fit a niche, they look different sound good and are efficient....
Anyhow... happy thanksgiving...