That is a truly interesting video!
Ya know, I've talked a bit about BRW and Madagascar RW fretboards vs IRW, ebony and maple. And in my experience, what was demonstrated here is very similar to what they do as fretboards on electric guitars.
I've said that BRW seems to get the attack of the note off faster. My experience is that Madagascar is just a bit slower, but has a beautiful tone. Now I know why: Velocity of sound. I've said the ebony doesn't work for me on an electric. Now I understand why that is, too. It's a drier sounding wood.
Of course, the dryness of ebony on an acoustic offsets the woods vibrating so audibly and ringing on an acoustic, instead of competing with those woods. So it works for me.
My experience as a player tells me that I'm not hearing things, even with an electric guitar. The woods matter. Those who disagree need to know what to listen for. Lots of players don't.
And now I know why my maple acoustic sounds the way it does (and why I like it): There's less competition with the top (mine's Adirondack spruce).