[Papervision3D] Curious about PapervisionX

[Paul Decoursey]

I saw this today,

http://www.bigspaceship.com/blog/labs/3d-vs-3d/

Its a bit stale, but I'm a bit slow...

They say they compared Flash 10 3D to papervision and specifically  
papervisionX, which I was under the assumption wasn't really out there  
yet.

towards the end they say:
"Update 02/13/09:
The papervision3d version that we refer to as “Public Alpha 3.0  
PapervisionX” is the CS4 branch in the SVN. All source code that we  
used is included in the zip file."

Is this a true statement?  I thought the CS4 branch was not PapervisionX