It's more a case of post before read. semantics.
I was actually about to read it in more depth.
Thanks for ensuring I don't have to.

That doco must've been updated recently*, as I'm quite certain I did that search & looked at it once.
Or at least someone else did, & linked to it...

As I hoped-for/suspected all along....
*EDIT*
But to support BT4.0 the chip must be wl1273l, I think lspci reveals wl1273 right?
Could just simply mean the driver there now, will be replaced w/a more suitable one come PR1.1/2.

*doc edit date doesn't seem to have been updated though.