Absolutely this. I don't really care about the science of it, different woods naturally have different densities and vibrate differently. This certainly carries through to the sound being amplified. Chambered bodies certainly have a stronger say than solid bodies, but its still very noticable. A solid Bubinga body sounds nothing like a solid Swamp Ash body. But, equally, a particular piece of bubinga may resonate differently than another one. I have owned four Warwick Thumb NT basses, for example, all having identical construction in terms of how "solid" the build is, and two pairs of the exact same pickups/preamp. They all sounded different, noticeably so.