I would have to strongly disagree with this statement.
If you follow this out, why not make electric bass bodies from plastic, graphite, concrete or whatever..... since it has no bearing on the tone.
(yeah, I know... they keep tryin')
I agree that there are many other things involved in instrument construction that have more drastic impact on what you hear from an instrument, but the wood definitely plays a role.
I agree that making gross generalizations about tone woods... maple= bright, rosewood= dark, ebony combines the depth of rosewood with the top end of maple..etc. can be difficult because every piece of wood can vary in density and there are so many other factors involved in tone. I think we've all seen this by playing multiple seemingly identical basses at the shop that all sound different.
It's interesting on the NS design page, in the history section it says:
"Ned wanted to develop and (sic) instrument that was not constrained by conventional design precepts, USING NEW MATERIALS FOR THE TONAL PROPERTIES THEY IMPARTED"
Funny.... if the material used for electric instruments has no bearing on the tone, why would you choose materials for the tonal properties they impart? 
If you follow this out, why not make electric bass bodies from plastic, graphite, concrete or whatever..... since it has no bearing on the tone.
(yeah, I know... they keep tryin')
I agree that there are many other things involved in instrument construction that have more drastic impact on what you hear from an instrument, but the wood definitely plays a role.
I agree that making gross generalizations about tone woods... maple= bright, rosewood= dark, ebony combines the depth of rosewood with the top end of maple..etc. can be difficult because every piece of wood can vary in density and there are so many other factors involved in tone. I think we've all seen this by playing multiple seemingly identical basses at the shop that all sound different.
It's interesting on the NS design page, in the history section it says:
"Ned wanted to develop and (sic) instrument that was not constrained by conventional design precepts, USING NEW MATERIALS FOR THE TONAL PROPERTIES THEY IMPARTED"