[quote name='BigRedX' timestamp='1425296800' post='2705863']
....I don't think that anyone can categorically state that a particular type of wood will produce a particular type of sound for every given example....
[/quote]
Has anyone ever said that? Not me, and I've never heard anyone in the bass making business claim that.
There might be people out there spinning a line, but they're not respected builders of basses.
Pieces of maple will have a similarity of sound, as will alder, as will mahogany and Brazilian rosewood and there will be variations within that signature sound, but a piece of maple will never sound like Brazilian rosewood. Most good luthiers will be hand picking and buying the better pieces of wood so these tones will be more consistent and fit the tone profile better. That will allow them to predict with a degree of certainty the overall sound of the instrument. The finished bass will have its own voice, but to a good maker that won't come as a surprise. There is a wide variety in design choices. Some choose the wood for the tone, Mike Tobias is one, and some like Alembic try to make neutral sounding basses so their sound is generated by their pickups.
Large volume manufacturers will just order wood in bulk, sight unseen and use every piece which is why their instruments can be so variable in weight, tone and sustain and can suffer from dead spots and lack luster tone. These basses are very likely to need to get their sound from the pickups because they're not going to get much of it from the wood.
That's fine because high volume manufacturers are selling to players who aren't interested in the smaller details of tone. But the differences are certainly there whether the general public can hear them or not, as with the differences between plonk and fine wine, Datsuns and Aston Martins, Cafe Creme and Havana cigars.... the list is endless.