> Those man pages are from X.org.  X.org supports 3d acceleration on
quoted text
> some (older) graphics cards but only 2d on some (newer) others.
> 
> OpenBSD does not support 3d acceleration on any cards.

Shouldn't this be considered a documentation bug?  Even though the man 
page

 http://www.openbsd.org/cgi-bin/man.cgi?query=radeon

is written by X.org, one might argue that changes to the man page should 
be part of the process of porting X to OpenBSD.