It isn't just plausible it is a fact. The wood does change things. It is the foundation of the instrument. To try to insinuate it doesn't tosses simple facts to the wind. How much of the wood change can actually be heard by the human ear could be up for discussion. Everyone hears different things. My wife can't tell the difference when I switch from the neck to the bridge but I can tell if identical guitars have rosewood or maple fingerboards. Closer to the low end of the spectrum I start loosing clarity though. I would be far less picky about my instrument if I played bass, but my bass player will only play with rosewood fretboards "because it is warmer". I can't hear the difference. That does not mean it is not there, only that I can't hear it.