My points #1 and #2 would have implications towards the sound quality.
Edit: here's a link that goes into some of the
issues.
There were a lot of comments about the wood being used affecting the timbre of the speaker based on the density of the wood, etc etc...the problem with that reasoning is the enclosure shouldn't make any sound in the first place.
I can accept that different materials might require different bracing and construction techniques, but two cabinets "braced to the same stiffness" will sound the same....and there is really no physical limitation preventing any sane material from working to the same levels of performance (except maybe the wallet).
So all that to say...using a bad design practice to claim a certain material superior to another is ultimately meaningless.
There also seems to be a lot of fixing of problems that are unknown, unquantified, or just plain don't exist.
To put things into perspective, how many people here can walk into a room and
hear what construction materials were used? Or do you have to look first?