I'm very much willing to bet the Solaris man page is NOT grossly misleading, since I know the past and present authors / maintainers of the cryptography framework on Solaris personally :-)

Also, one of the Solaris Security Engineers wrote about random number generation on Solaris extensively just last year:

https://blogs.oracle.com/darren/entry/solaris_random_number_...

Some blogs from other Solaris Security engineers:

Valerie Fenwick: http://bubbva.blogspot.com/

Dan Anderson: https://blogs.oracle.com/DanX/

Darren Moffat: https://blogs.oracle.com/darren

...and last, but not least, Enrico Perla (doesn't have a blog at the moment as far as I know) did author this book and is a Solaris Engineer and someone that works on Solaris Security-related things:

http://www.amazon.com/Guide-Kernel-Exploitation-Attacking-Co...