Well, nice thing about graph is if you don't agree with the sound, you look for the graph you like. If you don't like the graph, you say it doesn't sound like the graph.
Either way, it makes us much happier.
If you play around with EQ, you can get a sense of how far of a treble you need. Vocals, instruments, and etc.. extend so far. Many people think of treble extension as they must have up tot 20k, but the treble that people hear as being bright is from 6-10k. I think people tend to mix treble extension with treble peak. If they hear the peak at 6-10k, they may think it's extended, which not the case. So technically, Roxannes can be quite extended.